nematollah sedaghat; Abbas Biabani; morteza nasiri; Allahyar Fallah; nahid fathi
Abstract
Water plays a very important role in the rice plant. In order to investigate the effects of irrigation methods and foliar application of nutrients on growth, yield, yield components, and quality of rice, an experiment has been conducted as split plots layouts based on a randomized complete block design ...
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Water plays a very important role in the rice plant. In order to investigate the effects of irrigation methods and foliar application of nutrients on growth, yield, yield components, and quality of rice, an experiment has been conducted as split plots layouts based on a randomized complete block design with three replications and two factors including three irrigation methods (flooding, alternate wetting, drying, and Saturating) in the main plots as well as foliar spray in six levels (normal water, nitrogen, nitrogen+ potassium, nitrogen+ potassium+ zinc, nitrogen+ potassium+ zinc+ boron and nitrogen+ potassium+ zinc+ boron+ molybdenum) in the sub plots during 2018, in rice research institute, the deputy of Mazandaran (Amol), executed on a national cultivar. Results show that among irrigation method, fertilizer, and their interaction, paddy yield and percentage of amylose have been significantly at (p<0.01) percent with other qualitative traits being significant at (p<0.01) percent. The highest number of floret per panicle (198.73) and full grain (167.15), and percentage of amylose (21.67%) are obtained in saturated irrigation. The highest yield of paddy with an average of 6643.07 kg.ha-1 occurs in saturated irrigation under normal water foliar application and drought and moisture. Irrigation under nitrogen + potassium + zinc foliar irrigation with an average of 6163.13 kg.ha-1 compared to the control is obtained as the superior treatment in similar conditions were selected for this study.
mohammad ali esmaili; Hbibollah Ranjebar; Hemmatollah Pirdashti; Mortaza Nasiri
Abstract
The field experiment has been conducted as a split split plot based on a randomized complete block design with three replicaitons at Rice Research Institute of Mazandaran Province, Amol, in 2017. In this experiment, the seeds are sown in seedling box with different six bed treatments. These beds include ...
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The field experiment has been conducted as a split split plot based on a randomized complete block design with three replicaitons at Rice Research Institute of Mazandaran Province, Amol, in 2017. In this experiment, the seeds are sown in seedling box with different six bed treatments. These beds include S1: sulfur bed with 50% rice bran, S2: sulfur-free soil with 25% rice bran, S3: sulfur bed with 25% rice bran, S4: sulfur bed with Thiobacillus and 50% rice bran, S5: sulfur-free bed with wood compost and 25% rice bran, and S6: sulfur bed with Thiobacillus with 25% bran rice. After some measurements, the seedling is transplanted in the main field. In the field, different beds in box, seedling number per hill (3 and 5) and planting space (20×20 cm, 30×14cm) are assigned to the main plot, sub plot, and sub sub plot, respectively. The results of main cultivation show that the highest grain yield (5043 kg.ha-1) and biological yield (12319 kg.ha-1) are obtained from the treatment of bed soil with sulfur with 50% bran. Planting arrangement treatment in ratoon cultivation on number of hollow seeds (4.1), grain yield (1617 kg.ha-1), number of plants per hill treatment on number of tillers (10.3), leaf area (10.6 cm2), panicle length (20.4 cm) and grain yield (1613 kg.ha-1), and seedling type treatment on tiller number (10.4) show a statistically significant difference. Seedling grown in sulfur with 50% rice brain display the best performance in terms of yield and yield components in both main and ratoon cropping.
Maryam Saraei; Morteza Moballeghi; Morteza Nasiri; Mojtaba Nashaeemoghaddam
Abstract
The remobilization of carbohydrates in shoots is one of the effective factors to grain filling in rice. To determine the contribution of dry matter remobilization of shoots in different rice genotypes, a research has been carried out with seven rice genotypes and two controls in RCBD design with three ...
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The remobilization of carbohydrates in shoots is one of the effective factors to grain filling in rice. To determine the contribution of dry matter remobilization of shoots in different rice genotypes, a research has been carried out with seven rice genotypes and two controls in RCBD design with three replications during 2017-2018 at rice research station of Shahid Shiroodi in Tonekabon county. Results show that among all genotypes, rate of dry matter remobilization via the flag leaf, stem, and total shoot has differed significantly at (p<0.01) percent and from other leaves at (p<0.05) percent level. Mean comparison among the genotypes indicates that the highest dry matter remobilization from flag leaf belongs to Genotype 952 with 56 g.m-2. The maximum carbohydrates remobilization in other leaves, stem and total shoots are assigned to Genotype 953 at 123, 230, and 398 g.m-2, respectively. Highest grain yield belongs to Genotype 952 with 7206 kg.ha-1. Correlation analysis results show that grain yield is positively and significantly correlated with dry matter remobilization from flag leaf, stem, and total shoots, as well as 1000-grain weight, having coefficients of 0.37, 0.55, 0.51, and 0.44, respectively. As a result of yield and dry matter remobilization rate, and the positive and significant correlation between them, both Genotypes 952 and 953 are suitable for continuing research activity and introduce a new rice cultivar especially in drought and hot stress conditions at the grain filling stage.