【摘要】 以高产优质水稻品种空育131、龙粳26为试验材料,在尿素用量为300 kg/hm2、NPK比为1∶0.5∶0.5的施肥水平下,研究了4个插植密度对水稻叶片生长变化的影响。结果表明,分蘖力强的穗数型品种空育131的适宜插植密度为1.11~1.35万丛/667 m2,分蘖力中等的穗重型品种龙粳26的适宜插植密度为1.65~2.22万丛/667 m2。更多还原

【Abstract】 Field experiment was carried out to study the effects of different planting density on leaf growth of rice Kongyu 131 and Longjing 26 under the condition of urea fertilization amount 300 kg/hm2 and N ∶P ∶K proportion 1.0 ∶0.5 ∶0.5 in cold region in Helongjiang Province. The results showed that the optimum planting density for panicle number type rice Kongyu 131 were 166.5~202.5thousands hill/hm2, the optimum planting density for heavy panicle type rice Longjing 26 were 247.5~333.0 thousands hill/hm2.更多还原