不同的土壤培肥措施对双季稻土壤肥力及作物产量的影响

在赤壁市双季稻区研究了不同的土壤培肥措施对土壤理化性质及双季稻产量及产量组成的影响。结果表明,与单施化肥的处理相比,添加有机物料增加了土壤有机质、全氮、碱解氮、有效磷与速效钾含量;添加有机物料的土壤培肥处理的稻谷产量都有所增加,早稻产量增加最高达833.40 kg/hm~2,增产15.55%,最低增加475.05 kg/hm~2,增产8.87%;晚稻产量增加最高达733.35 kg/hm~2,增产10.72%,最低增加375.00 kg/hm~2,增产5.48%。化肥配合畜禽粪便处理显著增加了稻谷的有效穗与穗粒数,提高了水稻子粒与秸秆中的N、P、K养分含量。

Effects of Different Soil Fostering Fertility Measures on Soil Properties and Crop Yields in Double-season Rice

The effects of different soil fostering fertility measures on soil physical-chemical properties, crop yields and yields component were studied in double cropping rice system. The results showed that the content of soil organic matter,total N, alkali-hydrolysable N, available P and available K were higher in soil treatment of addition organic substance than in the single application of chemical fertilizer treatment. The early rice grain yields was increased up to 833.40 kg∕hm2,increased by 15.55%,at least increased 475.05 kg∕hm2,increased by 8.87%; The late rice grain yields was increased up to 733.35 kg∕hm2, increased by 10.72%,at least increased 375.00 kg∕hm2,increased by 5.48%. In contrast to single application of chemical fertil-izer treatment,chemical fertilizer combined with livestock and poultry dung treatment significantly increased productive spike of rice and spikelets per spike and enhanced N,P,K nutrients of rice grain and straw.