【摘要】 在大田条件下,以"汕优63"为对照,研究不同施氮量(0kg/hm2、100kg/hm2、200kg/hm2、300kg/hm2)对两系法亚种间杂交稻"两优培九"产量及氮素吸收利用特性的影响。结果表明,两优培九的吸氮量和干物质积累量随施氮量的增加而增加;籽粒产量和氮素利用率在1hm2施200kg氮时最高,高氮处理(1hm2施300kg氮)时反而降低;在相同施氮水平下,两优培九的籽粒产量、吸氮量、干物质积累量以及氮素利用率均高于汕优63。更多还原

【Abstract】 Shanyou 63" was used as check variety to study the effects of different nitrogen fertilizer levels (0 kg/hm2,100 kg/hm2,200 kg/hm2,300 kg/hm2) on intersubspecific hybrid rice "Liangyoupeijiu" under the field condition. The results showed that the amount of N uptake and accumulation rate of dry matter increased with the N application level. The yield and N utilization rate increased with N application level at first, amounted to the greatest value at moderate N level (200 kg/hm2), then descended at high N level (300 kg/hm2). The yield, amount of N uptake, accumulation rate of dry matter and N utilization rate of Liangyoupeijiu are higher than those of Shanyou 63 at the same N level.更多还原