Studies on ecological factors of rices from heading to maturity I. Effect of different soil moisture content on fruiting and grain quality of early indica rice
1989
Wang Renmin | Ding Yuanshu (Zhejiang Agricultural Univ., Hangzhou (China). Dept. of Agronomy)
The effect of different soil moisture content on fertilization, grain-filling and grain quality of rice from heading to maturity stages under pot test condition was studied in 1986. The result showed that, with the exception of treatments with soil moisture of 80% and 60% saturated content in the flowering stage, the single ear grain weight of all other treatments was decreased with the lowering of soil moisture content. Except the treatments with soil moisture at 80% of the saturated content in the flowering stage, the percentage of ripened grain was also decreased due to the increase of empty and unfilled grains with the decreasing of soil moisture content. When the soil moisture content dropped to 25% of the saturated content in the flowering stage, not only the percentage of unfilled grain but also the percentage of empty grain increased. 1000 grain weight did not significantly decrease until the soil moisture content dropped to 25% of the saturated content. When the soil moisture content lowers, the milled rice recovery and the brown rice protein content are both significantly raised, but the percentage of unripened grain decreased, meanwhile the amylose content in milled rice decreased.
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