scholarly journals Studies on Methods of Lowland Rice Culture on Upland Fields under irrigation : I. Adaptability of lowland rice varieties to the cultivation on upland fields under irrigation. : II. Differences in the growth and physiological characteristics between lowland rice and upland rice cultivated on upland field under irrigation

1959 ◽  
Vol 27 (3) ◽  
pp. 349-353 ◽  
Author(s):  
Saichi UMINO ◽  
Shunsuke IIZUKA ◽  
Fujio NONAKA ◽  
Hirokata YUYAMA
Keyword(s):  
Upland Rice ◽  
Lowland Rice ◽  
Physiological Characteristics ◽  
Rice Varieties ◽  
Rice Culture ◽  
Upland Field

EFFECTS OF FERROUS TOXICITY ON SEEDLING TRAITS AND ION DISTRIBUTION PATTERN IN UPLAND AND LOW LAND RICE UNDER HYDROPONIC CONDITIONS

2015 ◽  
Vol 78 (1-2) ◽  
Author(s):  
Nusrat Jahan ◽  
Norshila Fauzi ◽  
Muhammad Arshad Javed ◽  
Samiullah Khan ◽  
Siti Zulaiha Hanapi
Keyword(s):  
Upland Rice ◽  
Growth Parameters ◽  
Irrigation System ◽  
Lowland Rice ◽  
Ion Distribution ◽  
Rice Varieties ◽  
Seedling Traits ◽  
Plant Parts ◽  
Experimental Treatments ◽  
Hydroponic Conditions

Environmentally, nutritional disorders are the major constraints due to the change in soil pH for rice crop cultivated under different irrigation system. Iron toxicity is one of the famous nutritional disorders caused by the excessive uptake of ferrous ion in low pH under aerobic conditions. This research study was focused to measure the effect of different levels of ferrous stress on seedling traits, distribution of ferrous, potassium ions in two upland rice and three lowland rice varieties. The mean comparison of growth parameters were formulated using least significant differences, as well as the experimental treatments were compared by analysis of variance. Varieties showed significant differences for growth parameters; however, lowland rice varieties like Pokkali and Firat exhibited the minimum deterioration in growth parameters. The root length was significantly reduced under ferrous stress in all varieties. Ferrous accumulation was high in roots compared to aerial plant parts and flag leaves exhibited the minimum accumulations. Reduction of potassium reflected in all plant parts when an increased in stress was imposed. Upland rice varieties were found sensitive compared to lowland rice varieties. It is therefore; concluded that the growth parameters would be a reflecting index for ferrous toxicity in rice. Furthermore, the availability and uptake of potassium is improved, it may minimize the effects of ferrous toxicity. 

scholarly journals Analyses of yield related agronomic traits of Malaysian rice varieties

2020 ◽  
pp. 59-74
Author(s):  
Nur Aini Mohd Kasim ◽  
Chui-Yao Teh ◽  
Parameswari Namasivayam ◽  
Nur Fatihah Mohd. Yusoff ◽  
Chai-Ling Ho
Keyword(s):  
Agronomic Traits ◽  
Upland Rice ◽  
Oryza Sativa L ◽  
Total Yield ◽  
Development Program ◽  
Lowland Rice ◽  
Morphological Data ◽  
Phenotypic Traits ◽  
Rice Varieties ◽  
Plant Materials

Analyses of morphological and agronomic traits not only provide important information in the selection of rice varieties for breeding, these data are also important in deciding plant materials for molecular characterization and analysis of phenotypic traits of interest. The aim of the present study was to collect, analyze and compare the agro-morphological data of 6 upland rice and 17 lowland rice varieties (Oryza sativa L.) from the Malaysian rice germplasms grown under the same greenhouse condition. The common factors that contributed to yield per plant in both upland and lowland rice varieties are plant height and percentage of filled grains. Panicle length was positively correlated to grain yield in upland rice varieties while many other agronomic traits could affect the yield per plant in lowland rice varieties such as total number of tillers, total number of panicles per plant, flag leaf width and days-to-flowering. The upland rice varieties have a slightly higher average total grain number per panicle in compensation of a low number of panicles. The compensation in total grain numbers per panicle was not sufficiently significant to affect the total yield per plant most probably due to a low total number of grains per plant. Despite a high 100-grain weight in general, some of these upland rice varieties have more than 50% percentage of unfilled grains. Data on these rice germplasms may offer information on a valuable gene pool which can be utilized in different varietal improvement/development program in future.

scholarly journals Recovering Ability of Upland and Rainfed Lowland Rice Varieties against Rice Tungro Disease

2018 ◽  
Vol 21 (1) ◽  
pp. 91-100 ◽  
Author(s):  
MT Khatun ◽  
MA Latif ◽  
MM Rahman ◽  
M Hossain ◽  
TH Ansari ◽  
...  
Keyword(s):  
Upland Rice ◽  
Lowland Rice ◽  
Resistant Variety ◽  
Yield Reduction ◽  
Insect Vector ◽  
Rice Varieties ◽  
Rice Tungro Disease ◽  
Rainfed Lowland ◽  
Endemic Areas ◽  
Almost All

Rice tungro is the most destructive and widespread among virus diseases found in almost all rice growing areas. In susceptible varieties, it causes 100% yield loss under favourable environmental conditions. Control of tungro disease by chemical applications is not effective and eco-friendly. Development of resistant variety against tungro is also difficult, because it is necessary to develop resistance either to the insect vector or to the virus or to the both. Identification of varieties with recovering ability will facilitate farmers to cultivate rice in tungro endemic areas. Bangladesh Rice Research Institute released six upland and eight rainfed lowland rice varieties, which were tested to evaluate their recovering ability against tungro disease. The test varieties including susceptible and resistant checks were artificially inoculated by viruliferous vector (Green leafhopper, Nephotettix virescens) of ten days after seeding in net house condition. Among the tested varieties BR26, BRRI dhan33 and BRRI dhan40 were the most susceptible and showed high infection rate against tungro disease. BRRI dhan37 and BR8 showed the highest recovering ability in rainfed lowland and upland rice, respectively, with the lowest yield reduction compared to the resistant check Kumragoir, which could be used in tungro endemic areas. From these investigations, all the tested varieties expressed distinct tungro disease symptoms after three weeks of inoculation. With the advancement of plant growth, varieties BR8 and BRRI dhan37 recovered from tungro syndrome due to their genetic makeup consisting tolerance potentiality showed better yield, while other varieties like BRRI dhan33 and BRRI dhan40 did not produce any grain yieldBangladesh Rice j. 2017, 21(1): 91-100

scholarly journals Drought tolerance in selected aerobic and upland rice varieties is driven by different metabolic and antioxidative responses

Planta ◽  
2021 ◽  
Vol 254 (1) ◽  
Author(s):  
Giovanni Melandri ◽  
Hamada AbdElgawad ◽  
Kristýna Floková ◽  
Diaan C. Jamar ◽  
Han Asard ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Upland Rice ◽  
Vegetative Stage ◽  
Clear Understanding ◽  
Multiple Time ◽  
Rice Varieties ◽  
Antioxidant Power ◽  
Antioxidative Response ◽  
Biomass Loss ◽  
Osmotic Acclimation

Abstract Main conclusions Sugar-mediated osmotic acclimation and a strong antioxidative response reduce drought-induced biomass loss at the vegetative stage in rice. Abstract A clear understanding of the physiological and biochemical adaptations to water limitation in upland and aerobic rice can help to identify the mechanisms underlying their tolerance to low water availability. In this study, three indica rice varieties-IR64 (lowland), Apo (aerobic), and UPL Ri-7 (upland)-, that are characterized by contrasting levels of drought tolerance, were exposed to drought at the vegetative stage. Drought-induced changes in biomass, leaf metabolites and oxidative stress markers/enzyme activities were analyzed in each variety at multiple time points. The two drought-tolerant varieties, Apo and UPL Ri-7 displayed a reduced water use in contrast to the susceptible variety IR64 that displayed high water consumption and consequent strong leaf dehydration upon drought treatment. A sugar-mediated osmotic acclimation in UPL Ri-7 and a strong antioxidative response in Apo were both effective in limiting the drought-induced biomass loss in these two varieties, while biomass loss was high in IR64, also after recovery. A qualitative comparison of these results with the ones of a similar experiment conducted in the field at the reproductive stage showed that only Apo, which also in this stage showed the highest antioxidant power, was able to maintain a stable grain yield under stress. Our results show that different metabolic and antioxidant adaptations confer drought tolerance to aerobic and upland rice varieties in the vegetative stage. The effectiveness of these adaptations differs between developmental stages. Unraveling the genetic control of these mechanisms might be exploited in breeding for new rice varieties adapted to water-limited environments.

scholarly journals Response of rain-fed lowland rice varieties to different sources of N fertilizer in Fogera Plain, Northwest Ethiopia

2019 ◽  
Vol 5 (1) ◽  
pp. 1707020
Author(s):  
Amare Aleminew ◽  
Getachew Alemayehu ◽  
Enyew Adgo ◽  
Tilahun Tadesse ◽  
Manuel Tejada Moral
Keyword(s):  
Northwest Ethiopia ◽  
N Fertilizer ◽  
Lowland Rice ◽  
Rice Varieties ◽  
Different Sources

scholarly journals Genotype selection and addition of fertilizer increases grain yield in upland rice in Suriname

2017 ◽  
Vol 47 (3) ◽  
pp. 185-194 ◽  
Author(s):  
Adriano Stephan NASCENTE ◽  
Ruby KROMOCARDI
Keyword(s):  
Grain Yield ◽  
Management Practices ◽  
Upland Rice ◽  
Block Design ◽  
Field Trials ◽  
Application Rate ◽  
Rice Grain ◽  
Rice Varieties ◽  
Local Conditions ◽  
Randomized Block Design

ABSTRACT The upland rice farmers in Suriname use local varieties and low level technologies in the field. As a result, the upland rice grain yield is low, at about 1 000 kg ha-1. Our objective was to evaluate the use of upland rice cultivars from Suriname and Brazil, and the effect of nitrogen, N, phosphorus, P, and potassium, K, fertilizers on cultivation variables. We undertook four field trials in the Victoria Area, in the Brokopondo District, using a randomized block design each with four replications. The most productive rice varieties were BRS Esmeralda (grain yield 2 903 kg ha-1) and BRS Sertaneja (2 802 kg ha-1). The highest grain yield of 2 620 kg ha-1 was achieved with a top dressing application of 76.41 kg N ha-1 20 days after sowing. For P, the highest grain yield of 3 085 kg ha-1 was achieved with application of 98.06 kg ha-1 P2O5 applied at sowing. An application rate of 31.45 kg ha-1 of K2O at sowing achieved the highest grain yield of 2 952 kg ha-1. Together, these application rates of N, P and K resulted in rice grain yield of about 3 000 kg ha-1, which is three times greater than the national average for upland rice. We demonstrate that the use of improved rice varieties matched to the local conditions, and application of appropriate fertilizers, are management practices that can result in significant increases in rice grain yield in Suriname.

scholarly journals STUDIES ON THE BREEDING OF RICE VARIETIES RESISTANT TO STRIPE DISEASE : II. Genetic Study on Resistance to Stripe Disease in Japanese Upland Rice

1968 ◽  
Vol 18 (2) ◽  
pp. 96-101 ◽  
Author(s):  
Osamu Washio ◽  
kunio Toriyama ◽  
Akinori Ezuka ◽  
Yoshiro Sakurai
Keyword(s):  
Genetic Study ◽  
Upland Rice ◽  
Rice Varieties

scholarly journals Evaluation of Short Duration Drought Tolerant Rice Varieties in Drought Prone Areas of Subarnapur District of Odisha

2020 ◽  
pp. 21-26
Author(s):  
S. Pradhan ◽  
F. H. Rahman ◽  
S. Sethy ◽  
G. Pradhan ◽  
J. Sen
Keyword(s):  
Short Duration ◽  
Upland Rice ◽  
Plant Protection ◽  
Block Design ◽  
Rice Variety ◽  
Rice Varieties ◽  
Agronomic Practices ◽  
Drought Tolerant ◽  
Randomized Block Design ◽  
Sowing Seed

A study was conducted in farmer’s field through technology demonstrations during Kharif season of 2018 and 2019 in Subarnapur district of Odisha to recommend the most suited short duration drought tolerant upland rice variety particular to the locality. Six different varieties like Sahabhagi dhan, Mandakini, Jogesh, DRR-44, and DRR-42 & Khandagiri were taken with four replications in Randomized Block Design in both years. Technology demonstration included not only the improved short duration varieties, but also a package of good agronomic practices viz. line sowing, seed treatment with Bavistin, proper fertilization with dose @ 80:40:40 NPK/ha, pre emergence herbicide application with pretilachlor, needful manual weeding and  need based plant protection chemicals. The results of demonstration showed that farmers could increase rice productivity notably by adopting improved variety Sahabhagi dhan and DRR-44. These varieties recorded higher grain yields of 64% and 46%, respectively, and fetched a sum return of Rs 25620 and Rs 25275 over farmers’ local variety Khandagiri.

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