摘要
6年的定位试验结果表明:在寒冷稻作区的白浆型水稻土上,土壤有机质含量保持稳定,连续施用化肥可相应提高土壤氮、磷、钾的含量,长期不施某种养分,则土壤中该种速效养分含量呈下降趋势。连续施用稻草可明显提高土壤有机质含量,特明是稻草加氮磷钾处理,土壤有机质及各种养分的增加量明显高于其他处理,而且后四年的水稻产量均居首位,说明化肥与稻草配合施用有较好的改土肥田作用。在该种土壤上连续单施氮肥亦有稳定而极显著的增产效应,磷钾肥增产效果不显著。
Six-year fixed plot experiment showed Jthet continuous application of fertilizers could raise the contents of JN, P, K in cooler rice growing area where thert'was no obvious variation of soil organic matter contents. The effect was particularly better when rice staw and N,P?rv fertilizers were usedjtogether. The mixed application of rice straw and N, P:, K fertizers had a super ior^ef feet on soil fertility, which had also been proved by the high rice yield in the Jlast ffour years. Tl application of N fertilizer alone also increased the yield, but P and K fertilizers had no significant effect oh the yield.
出处
《吉林农业大学学报》
CAS
CSCD
1991年第1期45-49,共5页
Journal of Jilin Agricultural University
关键词
水稻土
稻草
氮
磷
钾
增产效应
rice straw N, P, K fertilizers
fixed plot experiment
