施肥措施对春播糯玉米的物质形成累积的影响研究

采用春播糯玉米研究不同施肥措施对其物质形成累积的影响。结果表明,糯玉米从拔节初期开始物质形成累积一直保持相当高的速率,其中在拔节开始至抽雄,吐丝开始至成熟收获期间形成两个高峰。在本试验条件下,氮素供应是施肥措施中对提高糯玉米物质形成累积和获取高产的主导因素,施磷钾肥也可获不同程度增产效果。回归分析表明,春播糯玉米氮磷钾适宜用量分别为:氮336.4 kg/hm2,磷(P2O5)71.8 kg/hm2和钾(K2O)152.7 kg/hm2。此外,施用氮肥可显著提高糯玉米的单苞鲜重和籽粒率。

Characteristics of dried matter mass cumulating and as affected by fertilization for spring-sowing sticky corn

A field trial,using the variety of Yuezinuo 5,was conducted in spring of 2009.results illustrated that dried matter mass maintained relatively high cumulating rates from the start of node elongating to mature during which two cumulating peaks occurred,one from node elongating to tasseling and the other from silking to harvesting.In conditions of this trial,N supply was the dominant factor of fertilization to increase dried matter mass and yield though application of P and K also increased yields to differen...