论文部分内容阅读
水稻长穗期是从幼穗开始分化到出穗这一个月左右的时间。这期间稻株的营养生长与生殖生长同时并进,生长发育十分旺盛,地上部积累的干物质以及对氮、磷、钾的吸收大约要占水稻一生中总积累和总吸收量的50％左右,故在此期合理施肥,可以发挥肥效的最大增产效果。若采用一个长穗期的简化诊断指标,把它运用在大面积水稻生产上,将有利于提高稻谷产量。一、诊断指标。据研究,长穗期的简化诊断指标.可采用倒三叶叶鞘(约抽穗前18—20天)的A/B值。水稻长穗期植株营养由分蘖期的氮代谢为主逐步转向碳代谢为主,稻株内(主要是叶鞘)淀粉积累的多少是衡量植株健壮和生长正常
The panicle of rice is a month or so from the beginning of young panicle differentiation to panicle emergence. During this period, the vegetative and reproductive growth of rice plants progressed at the same time. The growth and development were very strong. The accumulation of dry matter and the absorption of nitrogen, phosphorus and potassium in shoots accounted for about 50% of the total accumulation and total absorption of rice in the whole life. Therefore, reasonable fertilization in this period, you can maximize the effect of fertilization effect. If we adopt a simplified diagnostic index of a long panicle and apply it to large-scale rice production, it will be helpful to increase the rice yield. First, the diagnostic indicators. According to the study, a simplified diagnostic index of the long panicle, the A / B value of the inverted clover sheath (about 18-20 days before heading) can be used. The plant-panicle growth of rice mainly shifts from nitrogen metabolism at the tillering stage to carbon metabolism at the tillering stage. The accumulation of starch in the rice plants (mainly the leaf sheath) is a measure of the robustness and normal growth of the plants