栽培模式对超级杂交晚稻生长发育和产量及氮肥利用率的影响

选用优化栽培、轻简栽培、两段优化栽培和常规栽培4种晚稻栽培模式,在2个施缓释氮量的处理(折合纯氮分别是0、180kg/hm2)下,研究了栽培模式对超级杂交晚稻生长发育和产量及氮肥利用率的影响.结果表明:在施纯180kg/hm2条件下,两段优化栽培表现为产量最高,分蘖速度快,茎蘖数栽培幅度大,LAI和干物质积累量大,氮肥利用率高;其次为优化栽培,轻简栽培最小,但两段优化栽培生育期较长.优化栽培和轻简栽培生育期较适中.在不施氮水平下,也有相同的趋势.因此,超级杂交晚稻较优的栽培模式是两段优化栽培和优化栽培.

Effects of Growth and Development and Grain Yield and Nitrogen Use Efficiency of Super Hybrid Late Rice under Different Cultivation Modes

Effects of the growth and development and grain yield and nitrogen use efficiency on two different slow-release nitrogen fertilizer rate(equivalent to 0,180kg N/hm2,respectively)under four cultivation mode including in the experiment Optimized Cultivation Mode,Two Step Raising Seedling Cultivation Mode,Cast-transplanted Cultivation Mode and Conventional Cultivation Mode were studied.The results showed that Two Step Raising Seeding Cultivation Mode,compared with other cultivation mode,were quicker speed of tiller raising,more tillers,LAI,accumulations of dry matter,and higher nitrogen use efficiency and grain yield,but longer growth duration under the slow-release nitrogen fertilizer rate of 180kg/hm2(purified N).The second was Optimized Cultivation Mode,Cast-transplant Cultivation Mode was the last,and both of them had appropriate growth duration.Under 0kg/hm2 had the same results.As far as,the most appropriate cultivation mode for recommendation were Two Step Raising Seeding Cultivation Mode and Optimized Cultivation Mode..