Effects of irrigation and nitrogen on the yield components of fennel (Foeniculum vulgare Mill.)

1994 ◽  
Vol 34 (6) ◽  
pp. 845 ◽  
Author(s):  
M Buntain ◽  
B Chung
Keyword(s):  
Yield Components ◽  
Stem Elongation ◽  
Growth Stages ◽  
Full Irrigation ◽  
Flowering Stage ◽  
Foeniculum Vulgare ◽  
Late Flowering ◽  
Whole Plant ◽  
Dry Conditions ◽  
Different Growth Stages

A field experiment was conducted to study the effects of irrigation and nitrogen applied at different growth stages on the oil and anethole yields of fennel (Foeniculum vulgare Mill.), and its yield components. Irrigation increased the yield of whole plant dry matter, with the stem elongation stage being the most sensitive. Full irrigation and irrigation applied during the flowering and late flowering growth stages increased umbel and oil yields. Irrigation during the late flowering stage made the greatest contribution to oil yield, accounting for >80% of the yield due to full irrigation. This was attributed to the concurrent timing of irrigation during the late flowering stage with dry conditions and the development of the main oil-bearing structures, the secondary and tertiary umbels. Irrigation had no significant effect on the anethole concentration of the oil. The best economic return was achieved by irrigating during the late flowering stage. There was no significant effect of nitrogen on any of the yield components measured in this study.

scholarly journals Physiological responses and expression of VrDREB2A gene at different growth stages of mungbean (Vigna radiata L. Wilczek) under drought stress

2021 ◽  
Author(s):  
Hang Thi Thuy Vu ◽  
Cham Thi Tuyet Le ◽  
Ly Thi Pham
Keyword(s):  
Drought Stress ◽  
Yield Components ◽  
Plant Biomass ◽  
Physiological Responses ◽  
Growth And Yield ◽  
Relative Reduction ◽  
Growth Stages ◽  
Root Weight ◽  
Flowering Stage ◽  
Different Growth Stages

Abstract Mungbean is an important pulse crop and commonly grown in Asia. Drought affects mungbean growth and yield at at different growing stages and various levels through physiological traits and gene expression. In this study, two mungbean cultivars, DX208 and Tam Thanh Hoa, were exposed to drought at the vegetative and flowering stages and assessed for various morphophysiological traits at 8, 12, 15 and 15 days post withholding water and the plant recovery 7 days after re-watering. Differential expression of VrDREB2A gene was observed in leaf and root of two mungbean cultivars under drought condition. Plants used up water more quickly at the flowering stage than the vegetative stage. Drought adversely affected the plant height, leaf number, above-ground plant biomass and root weight with relative reduction to the control by 4.0–85%. Yield components and individual yield reduced significantly by around 50–60% compared to the control. Relative expression of VrDREB2A gene was varied, with stronger expression in leaves and roots when drought imposed at the flowering and vegetative stages respectively. Increase in VrDREB2A expression occurred earlier at 8 days compared with 12 days for drought imposed at the flowering and vegetative stages respectively, resulting in more tolerance of plants to drought at the flowering stage. The results indicate that VrDREB2A functioned as an important transcriptional activator and might help increase the drought stress tolerance of the mungbean plant at various growing stages. Morphophysiological traits can also be used as indicators in screening mungbean for drought tolerance.

scholarly journals Water and heat unit requirement in different growth stages of Soybean (Glycine max L. Merrill) at Bhopal

MAUSAM ◽  
2021 ◽  
Vol 58 (4) ◽  
pp. 537-542
Author(s):  
I. J. VERMA ◽  
H. P. DAS ◽  
V. N. JADHAV
Keyword(s):  
Crop Coefficient ◽  
Growth Stages ◽  
Maturity Stage ◽  
Degree Days ◽  
Flowering Stage ◽  
Heat Unit ◽  
Soybean Crop ◽  
Pod Development ◽  
Use Efficiency ◽  
Different Growth Stages

In this study, ET data available on Soybean crop for Bhopal during 1991-95 have been utilized.  With regard to water need of the crop, the life span of soybean has been divided into five important growth stages viz., seedling up to 2 weeks after sowing (WAS), vegetative (3-8 WAS), flowering (9-10 WAS), pod development (11-13 WAS), and maturity (14-15 WAS). In this paper, consumptive use of water (ET), Water Use Efficiency (WUE), Heat Units (HU), Heat Use Efficiency (HUE) and crop coefficient (Kc) for different growth stages of the crop have been computed and discussed.                The study revealed that on an average, Soybean crop consumed about 450 mm of water. The average WUE was found to be 3.23 kg /ha/mm. It was also observed that WUE does not depend only on the total amount of water consumed by the crop but also indicates the importance of its distribution during various growth stages. On an average, the crop consumed nearly 7%, 36%, 24%, 25% and 8% of water during seedling, vegetative, flowering, pod development and maturity stage respectively. The crop consumed maximum amount of water during vegetative stage. However, the average weekly ET rate was found to be highest during flowering stage (nearly 52 mm). Average heat unit requirement of soybean was found to be 1694 degree-days. Maximum heat units were required during vegetative stage (638 degree days) followed by pod development stage (358 degree days). The average HUE was found to be 0.86 kg/ha/degree days. Crop coefficient (Kc) values varied in the range 0.30 – 0.45, 0.55 – 0.90, 1.00 – 1.15, 0.85 – 0.70 and 0.55 – 0.40 during seedling, vegetative, flowering, pod development and maturity stage respectively. The crop coefficient values attained the peak during the flowering stage.  

scholarly journals Effect of Hardening to drought Tolerance on the Moisture Content of Sunflower Plant. III. Moisture Percentage in Whole Plant

2010 ◽  
Vol 7 (2) ◽  
pp. 888-894
Author(s):  
Baghdad Science Journal
Keyword(s):  
Drought Tolerance ◽  
Moisture Content ◽  
Agricultural Practices ◽  
Growth Stages ◽  
Full Irrigation ◽  
Whole Plant ◽  
Original Weight ◽  
Moisture Percentage ◽  
Plant Moisture ◽  
Plant Moisture Content

The study was conducted during spring seasons of 2000 and 2001.The aim was to study the changes in the moisture content of sunflower plants during growth stages under hardening conditions to drought tolerance .Agricultural practices were made according to recommendation. Asplit-split plots design was used with three replications. The main plots included irrigation treatments:irrigation to100%(full irrigation),75and50%of available water. The sub plots were the cultivars Euroflor and Flame.The sub-sub plots represented four seed soaking treatments: Control (unsoaked), soaking in water ,Paclobutrazol solution(250ppm),and Pix solution(500ppm). The soaking continued for 24 hours then seeds were dried at room temperature until they regained their original weight. Amount of water for each irrigation were calculated to satisfy water depletion in soil using a neutron meter. Results indicated that plant moisture content was not affected by irrigation treatments in both seasons and as a mean of seasons ,except after 72 days from planting in the season 2000.when stress 800 Kp caused a decreased in moisture content by 4.55and 5.18% compared with full irrigation and stress 600 Kp, respectively. Euroflor was superior over Flame after 30 days from planting by 13.64% in the season of 2000 and by 6.23% as a mean of seasons , and by 2.80% after 86 days from planting in the season of 2001.While Flame was superior by 2.75% after 58 days from planting in the season of 2001. Soaking in water , paclobutrazol and pix solutions increased plant moisture content by 4.56,3.92 and 3.82% after 86 days from planting in the season 2000 , soaking in water and paclobutrazol solution increased plant moisture content by 2.61 and 2.62% as amean of seasons compared with unsoaked treatment. In conclusion, soaking the seeds presowing in water or plant growth regulators could improve water relations of plants , and increase moisture content in plants tissues especially during flowering and seed filling , when the water requirements increased and associated with high temperature in spring season in Iraq.

scholarly journals Optimizing irrigation and determining the most sensitive development stage to drought in barley (Hordeum vulgare L.) in a semi-arid environment

2020 ◽  
Vol 79 (1) ◽  
pp. 87-94
Author(s):  
Leila Romdhane ◽  
Nicola Dal Ferro ◽  
Amor Slama ◽  
Leila Radhouane
Keyword(s):  
Water Potential ◽  
Water Deficit ◽  
Leaf Water Potential ◽  
Yield Components ◽  
Stem Elongation ◽  
Leaf Water ◽  
Water Deficit Stress ◽  
Growth Stages ◽  
Development Stages ◽  
Three Stages

Rising temperatures and increasing water scarcity, which are already important issues, are expected to intensify in the near future due to global warming. Optimizing irrigation in agriculture is a challenge. Understanding the response of crop development stages to water deficit stress provides an opportunity for optimizing irrigation. Here we studied the response of two barley varieties (Rihane, Martin), to water deficit stress at three development stages (tillering, stem elongation, and heading) by measuring water status and grain yield components in a field experiment in Tunisia. The three stages were selected due to their importance in crop growth and grain development. Water deficit stress was initiated by withholding water for 21 days at the three stages with subsequent re-watering. Water deficit led to a progressive decrease in leaf water potential. In both varieties, heading was the stage most sensitive to water deficit. Leaf water potential measurements indicated that water deficit stress was more severe during heading, which to some extent may have influenced the comparison between growth stages. During heading, the number of ears per plant and weight of a thousand grains were reduced by more than 70% and 50%, respectively compared with stress at tillering. Comparison of yield components showed differences between the two barley varieties only when the water deficit was produced during the tillering stage.

scholarly journals Cultural Characteristics, Virulence and In-vitro Chemical Control of Fusarium oxysporum f. sp. phaseoli of Bush bean (Phaseolus vulgaris L.)

2014 ◽  
Vol 12 (1) ◽  
pp. 103-110 ◽  
Author(s):  
SS Siddique ◽  
MKA Bhuiyan ◽  
R Momotaz ◽  
GMM Bari ◽  
MH Rahman
Keyword(s):  
Fusarium Oxysporum ◽  
Root Rot ◽  
Growth Stages ◽  
Pathogenicity Test ◽  
Flowering Stage ◽  
Pathology Laboratory ◽  
Leaf Yellowing ◽  
Bush Bean ◽  
Different Growth Stages

An experiment was conducted at Microbiology Laboratory of Plant Pathology Department, Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU) during 2007 to determine the virulence and variation in symptom development by Fusarium oxysporum f. sp. phaseoli isolates at different growth stages such as emergence and early vegetative stage, branching and rapid vegetative growth stage and early flowering stage of Bush bean, and in-vitro control of the pathogen with the selected fungicides. Eight isolates of this pathogen were collected from different pathology laboratory of BARI, BAU and BSMRAU. IS3 isolate collected from Bushbean seeds were found most virulent in pathogenicity test such as pre-emergence mortality, root rot, root lesion, leaf yellowing and wilting when this isolate was inoculated at different growth stages of bush bean. Four fungicides such as Vitavax, Rovral, Cupravit and Aimcozim were evaluated invitro to test the efficacy against isolate IS3. Aimcozim at different concentration (50-400 ppm) was found most effective in in-vitro evaluation. DOI: http://dx.doi.org/10.3329/agric.v12i1.19865 The Agriculturists 2014; 12(1) 103-110

Response of dry matter partition and yield components to waterlogging and sunlight shortage in different growth stages of wheat

2021 ◽  
Author(s):  
Min Jiang ◽  
Shouli Xuan ◽  
Muhammad Atif Muneer ◽  
Bin Sun ◽  
Chunlin Shi ◽  
...  
Keyword(s):  
Yield Components ◽  
Dry Matter ◽  
Growth Stages ◽  
Different Growth Stages

Maize response to broadcast flaming at different growth stages: Effects on growth, yield and yield components

2011 ◽  
Vol 34 (1) ◽  
pp. 10-19 ◽  
Author(s):  
Santiago M. Ulloa ◽  
Avishek Datta ◽  
Chris Bruening ◽  
Brian Neilson ◽  
Jared Miller ◽  
...  
Keyword(s):  
Yield Components ◽  
Growth Yield ◽  
Growth Stages ◽  
Yield And Yield Components ◽  
Maize Response ◽  
Different Growth Stages
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