Evaluation of seedling cultivation and irrigation regimes on yield and yield components in rice plant

Abstract

A split-plot experiment was conducted in a randomized complete block design with three replications in two cropping years at Mazandaran Rice Research Institute to study cultivation and irrigation regimes. The main factor is three-level irrigation regimes, permanent irrigation throughout the day (T1), irrigation two days after water disappears from the soil (T2) and permanent soil saturation (T3) the second factor is three-level cultivation methods., Plowless cultivation (W1), stack 60 cm (W2), and stack 80 cm (W3). Based on the results obtained from the combined analysis, the effect of the year was significant in terms of rainfall, productivity 2, number of tillers, number of empty grains, 1000-grain weight, percentage of the crushed grain, and white rice yield. The effect of the main factor was significant for all traits except productivity 1 and plant height. Based on the results of comparing the mean effect of year × treatment, four treatments, without plowing with permanent irrigation throughout the day in the first and second year of the experiment, cultivation without plowing with irrigation two days after water disappears from the soil in the second year of experiment and cultivation without Plowing with permanent saturated irrigation in the first and second years of the experiment was identified in terms of grain yield as suitable planting methods with appropriate irrigation regimes. Based on the results obtained from the polygon view in different years of the experiment, T3W1, T3W2, and T1W1 treatments can be suggested as desirable treatments in terms of irrigation regimes and cultivation methods in this rice cultivar. According to the ranking diagram of treatments based on traits in the years of experimentation, T1W1, T2W2 and T1W3 were introduced as the most desirable treatments for cultivating this rice cultivar.

Heritability and amylose content in hybrid lines of late-generation rice with colored pericarp

“…White rice is the result of introduction into the crop, that is, the white color of rice shells appears in representatives of this genus as a result of domestication. The color of the rice grain (a sign associated with antioxidant activity) is conditioned by the pigmentation of the sclerenchyma and (or) the pericarp and can vary widely: purple (violet/black), red, brown, yellow; variants are possible with uneven color (spotting) (Tumanian et al, 2020;Semeskandi et al, 2024). Rice grains rich in anthocyanins are recognized as an excellent source of natural and safe food dyes (Papillo et al, 2018;Anuyahong et al, 2020;Yi et al, 2020).…”