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近几年来,再生稻以它独特的省种、省工、节水、生育期短、日产量和经济效益高等优点而在水稻生产上大面积应用,并逐渐形成一种耕作制度。据统计,我省1989年杂交中稻收后蓄留再生稻600多万亩,亩产100公斤左右,总产近6.5亿公斤稻谷,成为增加全省粮食产量的重要途径。在再生稻生产上,杂交中稻何时收割既不影响头季稻产量,又有利于休眠芽多发,提高再生稻单产,有多种提法。本文在深入研究分析这一问题的基础上,提出了杂交中稻蓄留再生稻头季稻的适宜收割期和确定方法。 1.头季稻不同时期收割植株营养状况在其它处理相同的条件下,试验设头季稻齐穗后22天、25天、28天、31天和34天五个处理(下简称处理Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ);结果看出,随头季
In recent years, ratooning rice has been applied extensively on rice production due to its unique advantages of provincial species, provincial labor, water saving, short growth period, high daily output and economic benefits, and gradually formed a farming system. According to statistics, more than 600 million mu of regenerative rice were collected and collected in 1989 after the hybrid rice was harvested in the province. About 100 kilograms of mu was produced per mu and the total output was nearly 650 million kilograms of rice. This has become an important way to increase grain output in the whole province. In ratoon rice production, when hybrid rice harvest does not affect the yield of the first season rice, but also conducive to multiple occurrence of dormant buds and improve the yield of ratoon, there are a variety of references. Based on the deep research and analysis of the problem, this paper proposed the suitable harvesting period and the determination method of the first crop of ratoon rice with ratoon rice. The results showed that: (1) The nutritional status of the first season paddy harvested at different periods Under the same conditions of other treatments, five treatments of 22, 25, 28, 31 and 34 days after the heading of the first season paddy were conducted, Ⅱ, Ⅲ, Ⅳ, Ⅴ); The results show that with the first season