论文部分内容阅读
通过杂交早稻的组合、施氮量、基本苗和秧龄对产量效应的研究表明:威优64具有最高的产量,杂交早稻每公顷以插基本苗90万、施纯氮量187.5公斤以下为宜;在稀播条件下,35天以内的秧龄均适宜。通径分析表明:杂交早稻要获得高产,必须抓住每公顷有效穗与每穗饱粒数这两个因素,使有效穗、穗粒数、结实率和千粒重之问达到最大的协调。为此,本文提出了要使杂交早稻每公顷产7500公斤的群体动态、库源关系等指标。
Through the combination of early hybrid rice, nitrogen application rate, basic seedling and seedling age, the yield effect showed that: Weiyou 64 had the highest yield, hybrid early rice per hectare to insert basic seedlings 900000, application of pure nitrogen 187.5 kg less appropriate; Under thinning conditions, the seedling age within 35 days are appropriate. Path analysis showed that to obtain high yield of early hybrid rice, we must grasp the effective spike per hectare and the number of spikelets per panicle two factors, so that the effective spikes, grains per spike, grain yield and grain weight to achieve maximum coordination. To this end, the paper proposes the group dynamics of 7500 kg per hectare of hybrid early rice, the relationship between source and sink and other indicators.