【摘要】 为了给直播水稻合理施用氮磷钾肥提供科学依据。通过氮、磷、钾施肥量的不同配比试验,探索合理的直播水稻配合施肥量。以黄华占为材料,研究了不同氮磷钾配施水平对水稻生物学特性和主要农艺性状的影响。结果表明:不同肥料及配施方式在一定程度上影响水稻的株高、有效分蘖和穗粒数,进而表现在产量上差异极为明显,氮磷钾3种肥料对产量影响大小依次是氮、钾、磷。在本试验地肥力条件下,推荐氮(N)、磷(P2O5)、钾(K2O)施肥量分别为:224.85 kg/hm2,31.30 kg/hm2,296.45 kg/hm2。更多还原

【Abstract】 In order to provide scientific basis of giving rational fertilization on rice NPK fertilizer. Different proportion experiment in nitrogen, phosphorus, and potassium fertilizers was used to study the reasonable mixed fertilizing rate of direct seeding rice. To Huanghuazhan as materials, the effects of main agronomic characters and biological characteristics were studied with different levels of NPK fertilizer. The results showed that, different level and rate of fertilizer influenced plant height, effective tillering and seeds per ear in some degree, then the performance in the yield differences was extremely obvious, the importance of the influence on output by three fertilizers were as followed by nitrogen, potassium and phosphorus. Fertilizer recommendations were nitrogen(N), phosphorus(P2 O5), potassium(K2 O) fertilizer were 224.85 kg/hm2, 31.30 kg/hm2and 296.45 kg/hm2respectively under the condition of this experiment.更多还原