N肥基蘖肥与穗肥比例对旱直播稻群体质量和产量的影响

目的]为大面积生产所需的综合配套技术提供依据。方法]以中粳稻品种皖稻68为试材,研究N肥基蘖肥与穗肥比例对旱直播稻群体质量和产量的影响。结果]N肥基蘖肥与穗肥比例以6∶4（基∶蘖∶促∶保=4∶2∶2∶2）与5∶5（基∶蘖∶促∶保=3∶2∶3∶2）的产量最高;不施基蘖肥不利于提高分蘖率,对叶龄影响较大,但过重施用基蘖肥,则使无效分蘖增多,有效叶面积率降低;适当增加穗肥,有利于提高单位面积总颖花量、群体的有效叶面积率、高效叶面积率及粒叶比。结论]N肥基蘖肥与穗肥的最适比例为6∶4（基∶蘖∶促∶保=4∶2∶2∶2）与5∶5（基∶蘖∶促∶保=3∶2∶3∶2）。

Influence of Basic Tillering and Panicle Nitrogen Proportion to the Quality and Output of Population of the Dry Derect Seeded Rice

Objective]The study aimed to provide basis for comprehensive technique on large area production. Method]With paddy Wandao 68 as test material,the influence of proportions of basic tiller fertilizer and panicle fertilizer on quality and output of the population of dry direct seeding rice was studied. Result] The proportions of basic tillering and panicle Nitrogen with 6∶4 and 5∶5 have given the highest yield; No fertilizer of tillering was not good to enhance tillering rate and had very significant influence on the leaf age,but too much basic tiller fertilizer made ineffective tillers increased and effective leaf area ratio decreased; Proper tillering could raise the total amount of spikelet of unit area and the effective and high effective leaf chopper of population and grain-leaf ratio. Conclusion]The best proportions of basic tiller fertilizer and panicle fertilizer were 6∶4 and 5∶5.