scholarly journals The application of the multivariate analysis method for some traits in wheat under drought stress

2015 ◽  
Vol 60 (4) ◽  
pp. 407-417
Author(s):  
Seyed Mirtaheri ◽  
Farzad Paknejad ◽  
Marieh Behdad
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Harvest Index ◽  
Stem Elongation ◽  
Block Design ◽  
Growing Season ◽  
Stress Path ◽  
Research Field ◽  
Randomized Block Design ◽  
The Relationship

In order to evaluate the relationship between yield and some relevant traits and estimation of the most effective traits on grain yield, a split-plot experiment based on completely randomized block design with four replications was carried out in 2006-2007 in the research field of Islamic Azad University of Karaj. The irrigation schemes scheduled as main plots included the following: (T1) 40% moisture depletion throughout the growing season (control); (T2) 60% moisture depletion throughout the growing season; (T3) 80% moisture depletion throughout the growing season; (T4) no irrigation during the stem elongation stage and continuing with adequate irrigation to the end of the growing season; (T5) no irrigation from the stem elongation stage to the end of the growing season; (T6) no irrigation at flowering and continuing with adequate irrigation to the end of the growing season; (T7) no irrigation from flowering to the end of the growing season; and (T8) no irrigation from the milk stage to the end of the growing season; and 2 wheat cultivars [Marvdasht (V1), Chamran (V2)] as sub-plots. According to the results of simple correlation, the grain yield exhibited the most positive correlation with biomass (0.877), number of infertile spikelets (0.876) and harvest index (0.855). The results of step-wise regression showed that, in the absence of drought stress, biomass and harvest index had respectively the most important effects on the grain yield but both exhibited different results under drought stress. Path analysis results showed that the most important effect on the grain yield in the total tested treatments was related to the biomass, justifying a total of 87% of grain yield variations, 72% of which is the direct effect of this trait on grain yield.

scholarly journals Performance of separated tillers of transplant Aman rice at different levels of urea super granules

2016 ◽  
Vol 40 (4) ◽  
pp. 581-590
Author(s):  
KS Rahman ◽  
SK Paul ◽  
MAR Sarkar
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Harvest Index ◽  
Block Design ◽  
Research Field ◽  
Control Treatment ◽  
Alternative Source ◽  
Randomized Complete Block Design ◽  
Effect Of Age ◽  
Different Levels

An experiment was conducted at the research field of Department of Agronomy, Bangladesh Agricultural University, Mymensingh during June to December 2012 to investigate the effect of age of tiller seedlings, number of tiller seedlings hill-1 and application of urea super granules (USG) on the yield and yield contributing characters of transplant Aman rice (cv. BRRI dhan52). The experiment consisted of two ages of tiller seedlings viz. 25 and 35-days old, three levels of tiller seedlings hill-1 viz. 1, 3 and 5 seedlings hill-1 and three levels of USG viz. 0, 1.8 (55 kg N ha-1) and 2.7g USG (80 kg N ha-1) four hill-1 in every alternate row. The experiment was laid out in a Randomized Complete Block Design (Factorial) with three replications. The highest plant height, number of effective tillers hill-1, number of total tillers hill-1, number of total spikelets panicle-1, number of grains panicle-1, grain yield and harvest index were found in 1.8 g USG applied @ one granule 4-hill-1. The highest number of sterile spikelets panicle-1 was found in control treatment and the lowest in 1.8 g USG. The highest number of effective tillers hill-1, number of total spikelets panicle-1 and grain yield ha-1 was found when 5 tiller seedlings were transplanted hill-1 combined with 1.8 g USG. Application of urea super granules 1.8 g (55 kg N ha-1) at 10 days after transplanting @ one granule 4-hill-1 in every alternate row with 25 day old tiller seedlings using 5 tiller seedlings hill-1 was found beneficial for grain yield of transplant Aman rice. Tiller separation could be an alternative source of seedling during seedling scarcity.Bangladesh J. Agril. Res. 40(4): 581-590, December 2015

scholarly journals Effects of Potassium and Iron on Yield of Corn (Zea Mays L.) in Drought Stress

2014 ◽  
Vol 47 (1) ◽  
pp. 39-47 ◽  
Author(s):  
K. Zare ◽  
F. Vazin ◽  
M. Hassanzadehdelouei
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Block Design ◽  
Dry Weight ◽  
Yield Component ◽  
Research Field ◽  
Control Treatment ◽  
Yield Reduction ◽  
Relative Water ◽  
The Impact

ABSTRACT In hot and arid regions, drought stress is considered as one of the main reasons for yield reduction. To study the effect of drought stress, Iron and potassium spray on the yield and yield components of corn, an experiment was carried out during the crop seasons of 2010 and 2011 on Abosaeid research field of Mahvellat as a split factorial within randomized complete block design with three replicates. The main plots with irrigation factor and three levels were considered: irrigation per 6, 9 and 12 days. Subplots were considered with and without Iron and potassium spray. The irrigation reduced the grain yield in irrigation per 12 more than other stages. Irrigation effects significantly on chlorophyll value, leaf relative water content, stem, ear and leaves dry weight, number grain in ear and row, number row in ear, unfilled seed percentage and thousand grains weight. Iron increased the seed yield and yield component, except unfilled seed percentage and SPAD. Using K, as compared with control treatment, causes the increase of grain yield, 1000 grains weight and number grain in ear 16.5, 9 and 5.5% respectively. Potassium could somewhat reduce the impact drought stress on corn.

scholarly journals Leaf Clipping and Population Density Effects on Green Fodder and Grain Yield for Hybrid Maize (Zea mays) in Bangladesh

2019 ◽  
Vol 7 (2) ◽  
pp. 55-62
Author(s):  
Golam M. Rokon ◽  
Md.Mahmudul H. Khan ◽  
Md.Maniruzzaman Bahadur ◽  
Maruf H. Shanto ◽  
Md.Khairul Alam ◽  
...  
Keyword(s):  
Population Density ◽  
Grain Yield ◽  
Harvest Index ◽  
Smallholder Farmers ◽  
Block Design ◽  
Research Field ◽  
Yield Attributes ◽  
Leaf Clipping ◽  
Green Fodder ◽  
Fodder Yield

Smallholder farmers having fragmented lands need fodder and grains simultaneously for earning food security for their families. A study was conducted in Crop Physiology and Ecology Research Field and Laboratory at Hajee Mohammad Danesh Science and Technology University, Bangladesh during the period of March to July-2013 to investigate the effect of leaf clipping and population density on fodder and grain yield in maize. Three population densities (D1= 75 cm × 25 cm, D2= 60 cm × 20 cm and D3= 50 cm × 20 cm) and three clipping treatments (C1 = no clipping, C2 = removal of all leaf blades below the lowermost cob and C3 = removal of all leaf blades above the uppermost cob) at the silking stage were included as experimental treatments. The experiment was laid out in a two factors Randomized Complete Block Design (RCBD) with three replications. Results revealed that D1 required the maximum days to attain most of the phenological stages of maize. Higher population density (D3) with C3 clipping treatment gave the highest plant height, whereas D1 with non-clipping treatment gave the lowest. Highest total dry matter (TDM) was found in D2 with C1 and the lowest was found in D1 with C1 treatment. The highest yield (8.88 t ha-1) and harvest index (36.2%) were found in D3 treatment whereas the lowest yield (5.92 t ha-1) in D1 population density but harvest index (32.6 %) was lowest in D2. The highest yield (8.33 t ha-1) and harvest index (35.5 %) were obtained from C1 treatment and the lowest yield (6.55 t ha-1) and harvest index (33.5 %) were obtained from C3 treatment. The highest fodder yield (3.33 t ha-1) was obtained from D3 treatment and the lowest (2.11 t ha-1) in D1 treatment. In C2 treatment, the highest amount of fodder (4.67 t ha-1) was obtained. The interaction between population density and leaf clipping treatment showed a significant variation among the yield and yield attributes in maize. It is indicated that D3 and C1 combination showed the best performance in respect of grain yield (9.67 t ha-1) and harvest index (38.3 %) of maize. But for both grain and fodder yield, D3 with C2 showed the best performance.

Soil test based fertilizer prescriptions through integrated nutrient management using targeted yield approach for rice

2020 ◽  
Vol 57 (2) ◽  
pp. 139-145
Author(s):  
D Mounika ◽  
G Kishore Babu ◽  
M Martin Luther
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Nutrient Management ◽  
Block Design ◽  
Soil Test ◽  
Straw Yield ◽  
Fertilizer Recommendation ◽  
Randomized Block Design ◽  
Agricultural College ◽  
College Farm

A field experiment was conducted at the Agricultural College farm, Bapatla, during kharif and rabi 2017-18 and 2018-19. The experiment was conducted with variety BPT-5204 in a randomized block design with ten treatments and three replications. The maximum Number of panicles m-2, total filled grains panicle-1, test weight, grain yield, straw yield, harvest Index and return per rupee investment were recorded with soil test based fertilizer recommendation with 10 t ha-1 FYM application which was at par with soil test based fertilizer recommendation alone and 7.5 t ha-1 targeted yield recommendation along with FYM (T5 and T10) and RDF with FYM (T6). Grain yield of rice was significantly higher with soil test based fertilizer recommendation with 10 t ha-1 FYM application which was statistically at par with soil test based fertilizer recommendation alone (T2) and 7.5 t ha-1 targeted yield fertilizer recommendation with FYM (T10) compared to the rest of the treatments.

scholarly journals Correlations and path analysis in soybean progenies with resistance source to cyst nematode (race 3)

2019 ◽  
Vol 10 (1) ◽  
pp. 168-175
Author(s):  
Daniela Sarti Dvorjak ◽  
Sandra Helena Unêda-Trevisoli ◽  
Wallace De Sousa Leite ◽  
Alysson Jalles da Silva ◽  
Fabiana Mota da Silva ◽  
...  
Keyword(s):  
Grain Yield ◽  
Path Analysis ◽  
Agronomic Traits ◽  
Block Design ◽  
Correlation Coefficients ◽  
Randomized Block Design ◽  
Important Study ◽  
Genotypic Correlations ◽  
The Relationship ◽  
Number Of Seeds

Path analysis is an important study that slices the correlation coefficients between two variables to evaluate whether the relationship between them is of cause and effect. This study aimed to estimate the phenotypic and genotypic correlations between agronomic traits and perform a path analysis in order to identify variables for indirect selection aiming at a higher grain yield. Fourteen soybean F6 lines from the soybean breeding program of FCAV–UNESP, Jaboticabal, São Paulo, Brazil, were analyzed. The experimental design was a randomized block design with three replications. The agronomic traits plant height at maturity (PHM), first pod height (FPH), lodging (Ld), agronomic value (AV), number of pods per plant (NP), number of seeds per plant (NS), and grain yield (GY) were evaluated. Overall, the genotypic correlations were higher than their corresponding phenotypic correlations. The genotypic correlations between grain yield and the traits agronomic value, number of pods per plant, and number of seeds per plant were positive, significant, and of high magnitude. Path analysis showed that the trait number of seeds per plant had the highest direct effect on grain yield, while the trait number of pods per plant had the highest indirect effect through the number of seeds per plant on grain yield

scholarly journals Effect of Silicon Nutrition on Yield, Uptake and Agronomic Efficiency of Paddy in Acid Lateritic Soils of Odisha

2021 ◽  
pp. 279-291
Author(s):  
Aliva Das ◽  
Prasanna Kumar Samant ◽  
Gayatri Sahu ◽  
Gour Hari Santra
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Production Efficiency ◽  
Block Design ◽  
Nutrient Status ◽  
Basic Oxygen Furnace ◽  
Vital Role ◽  
Agronomic Efficiency ◽  
Available N ◽  
Randomized Block Design

A field experiment was conducted in the central farm, Regional Research and Technology Transfer Station, Coastal Zone OUAT, Bhubaneswar during kharif 2020 using cv-Lalat variety of Rice. The experiment was laid out in randomized block design (RBD) with ten treatments and three replications. In this experiment BOF (Basic Oxygen Furnace) slag was used as a source of silica for application to rice crop. 200, 300 and 400 kg SiO2/ha was applied in combination with 50% STD and 75% STD in order to assess the efficacy of Silica with reduction in fertilizer dose by 50% and 25%. It was shown in case of grain yield, straw yield, and harvest index, 100% STD (T4) registered maximum (36.9q/ha) grain yield which was 29.4% more than that of control. Of course, grain yield in case of T9i.e., 75% STD+300kg SiO2/ha was at par 36.2q/ha indicated efficacy of silica application by reducing fertilizer dose. Harvest index was not significantly affected by Si treatments. However, maximum HI (0.478) was observed in T9. Available N, P, K and S status in post-harvest soil was increased significantly due to application of silica along with fertilizer over control indicated better availability of nutrients which plays a vital role in increasing production and productivity of rice. The content and uptake of N, P, K and Si was significantly increased over control due to application of silica with fertilizer. Though 100% STD (T4) was found to be very effective as compared to other treatments but 75% STD+300kgSiO2/ha was also equally effective so far as yield, yield attributing characters, available nutrient status, N, P, K and Si content and uptake along with Relative Agronomic Efficiency (RAE), Agronomic Efficiency (AE), Apparent Recovery (%) AR and Production Efficiency (PE) are concerned.

scholarly journals Screening of Pearl Millet Genotypes for High Temperature and Drought Tolerance Based on Morpho-Physiological Characters

2021 ◽  
pp. 74-80
Author(s):  
R. C. Meena ◽  
Moola Ram ◽  
Supriya Ambawat ◽  
C. Tara Satyavathi ◽  
Vikash Khandelwal ◽  
...  
Keyword(s):  
High Temperature ◽  
Drought Tolerance ◽  
Grain Yield ◽  
Chlorophyll Content ◽  
Pearl Millet ◽  
Harvest Index ◽  
Block Design ◽  
Seed Setting ◽  
Randomized Block Design ◽  
Stover Yield

Aims: Screening of pearl millet genotypes lines for high temperature and drought tolerance. Study Design:  Randomized Block Design (RBD) with three replications. Place and Duration of Study: ICAR-AICRP on Pearl Millet, Mandor during summer 2017-18. Methodology: Fifteen genotypes (J-2290, J-2340, J-2479, J-2500, J-2503, J-2507, J-2517, J-2534, JMSB-9904, JMSB-101, JMSB-20064, JMSB-20102, JMSB-20071, JMSB-20082 and JMSB-20091) of pearl millet received from Main Pearl millet Research Station, Junagadh Agricultural University, Jamnagar were evaluated during  summer season of 2017-18 at research Farm of ACIRP on pearl millet, Mandor, Agricultural University, Jodhpur under terminal moisture stress  and irrigated  conditions in two sets of randomized block design with three replications. Grain yield, stover yield, Relative Water Content (RWC), harvest index, threshing percentage and chlorophyll content were recorded. Results: The suitability of the genotypes was judged in terms of grain yield, stover yield, RWC, harvest index, threshing percentage and chlorophyll content. The results showed that due to the terminal stress, the mean performance of all yield attributing characters including grain yield and chlorophyll, RWC and seed setting was reduced. The inbreds J-2479, J-2503 and J-2507 were high yielders due to high seed setting percentage under terminal stress conditions. Conclusion: The lines viz., J-2479, J-2503 and J-2507 can be used for further breeding programme to develop varieties suitable under high temperature and low moisture conditions.

scholarly journals Effect of organic nutrient sources on productivity of soybean[Glycine max (L.) Merril]

2018 ◽  
Author(s):  
Sentirenla Changkija ◽  
T. Gohain
Keyword(s):  
Glycine Max ◽  
Grain Yield ◽  
Harvest Index ◽  
Block Design ◽  
Poultry Manure ◽  
Growth And Yield ◽  
Nutrient Sources ◽  
Organic Nutrient ◽  
Randomized Block Design ◽  
Glycine Max L

The experiment was laid out in a randomized block design (RBD) with six treatments and replicated thrice Growth and yield significantly increased by the application of different nutrient sources. Application of Poultry manure @ 6 t ha-1 + Rhizobium @ 20g kg-1 seed + Phosphatica @ 20g kg-1 seed (T6) enhanced both the growth and yield of crop. Maximum number of pods plant-1 (67.73), seeds pod-1 (2.83), grain yield (1513 kg ha-1) and Harvest index(45.62 %) were observed with Poultry manure @ 6 t ha-1 + Rhizobium @ 20g kg-1 seed + Phosphatica @ 20g kg-1 seed (T6).

scholarly journals Growth, yield and quality of two guar (Cyamopsis tetragonoloba L.) ecotypes affected by sowing date and planting density in a semi-arid area

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257692
Author(s):  
Maryam Mahdipour-Afra ◽  
Majid AghaAlikhani ◽  
Soleiman Abbasi ◽  
Ali Mokhtassi-Bidgoli
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Plant Density ◽  
Block Design ◽  
Research Field ◽  
Planting Density ◽  
Cyamopsis Tetragonoloba ◽  
Sowing Dates ◽  
Plant Densities ◽  
Gum Content

The growth period, phenology, grain yield and gum content of two different guar ecotypes were studied in response to different sowing dates and plant densities. A two-year field experiment was conducted as a split-factorial in a randomized complete block design (RCBD) with three replicates in the research field of Tarbiat Modares University during 2016 and 2017 growing season. Main plots consisted of four sowing dates (May 21, June 4, June 21 and July 5 in 2016 and May 10, May 26, June 10 and June 26 in 2017), and subplots including three plant densities (13, 20 and 40 plants m-2) and two ecotypes (Pakistani and Indian). Based on findings, the phenological traits, plant height, grain yield and harvest index were significantly affected by plant density. The effect of ecotypes was statistically significant (p<0.05) on all traits except harvest index in the first year. Furthermore, the seed sowings on May 21 and May 26 with 13 plants m-2 led to highest grain yield (3004.8 and 2826.10 kg.ha-1 for two consecutive years). The high gum content (33.68 and 33.78% for two consecutive years) was also recorded for Pakistani ecotype while for gravity, Indian ecotype showed higher value in both crop years. By and large, the Pakistani ecotype showed better response compared to the Indian one in both years, especially in 1st and 2nd sowing dates.

IMPROVEMENT OF SPRING DURUM WHEAT SELECTION METHODOLOGIES UNDER CLIMATE CHANGE CONDITIONS

1970 ◽  
pp. 33-36
Author(s):  
А. I. Grabovets ◽  
V. P. Kadushkina ◽  
S. А. Kovalenko
Keyword(s):  
Grain Yield ◽  
Durum Wheat ◽  
Correlation Coefficient ◽  
Harvest Index ◽  
Unit Area ◽  
Correlation Coefficients ◽  
Chemical Mutagenesis ◽  
Main Method ◽  
The Relationship ◽  
Selection Of

With the growing aridity of the climate on the Don, it became necessary to improve the methodology for conducting the  breeding of spring durum wheat. The main method of obtaining the source material remains intraspecific step hybridization. Crossings were performed between genetically distant forms, differing in origin and required traits and properties. The use of chemical mutagenesis was a productive way to change the heredity of genotypes in terms of drought tolerance. When breeding for productivity, both in dry years of research and in favorable years, the most objective markers were identified — the size of the aerial mass, the mass of grain per plant, spike, and harvest index. The magnitude of the correlation coefficients between the yield per unit area and the elements of its structure is established. It was most closely associated with them in dry years, while in wet years it decreased. Power the correlation of the characteristics of the pair - the grain yield per square meter - the aboveground biomass averaged r = 0.73, and in dry years it was higher (0.91) than in favorable ones (0.61 - 0.70) , between the harvest and the harvest index - r = 0.81 (on average). In dry years, the correlation coefficient increased to 0.92. Research data confirms the greatest importance of the mass of grain from one ear and the plant in the formation of grain yield per unit area in both dry and wet years. In dry years, the correlation coefficient between yield and grain mass per plant was on average r = 0.80; in favorable years, r = 0.69. The relationship between yield and grain mass from the ear was greater — r = 0.84 and r = 0.82, respectively. Consequently, the breeding significance of the aboveground mass and the productivity of the ear, as a criterion for the selection of the crop, especially increases in the dry years. They were basic in the selection.

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