双季稻种植制度下长期施肥对红壤性水稻土氮素肥力的影响  

Effect of long-term fertilization on soil nitrogen fertility of reddish paddy soil under double rice-cropping system

作　　者：向艳文[1] 郑圣先[2,3] 廖育林[2,3] 谢坚[2] 聂军[2,3] 

机构地区：[1]中南大学隆平分院,湖南长沙410125 [2]湖南省土壤肥料研究所,湖南长沙410125 [3]农业部望城水稻生态环境重点野外观测实验站,湖南长沙410125

出　　处：《湖南农业大学学报（自然科学版）》2008年第6期704-707,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：国家科技支撑计划项目(2006BAD05B09;2008BADA4B08);国际植物营养研究所(IPNI)中国项目(HN-13)

摘　　要：设CK(不施任何肥)、NK(施氮、钾肥)、NP(施氮、磷肥)、NPK(施氮、磷、钾肥)、NK+PM(施氮、钾肥+猪粪)、NP+RS(施氮、磷肥+稻草)、NPK+RS(施氮磷钾肥+稻草)7个处理,通过25年长期肥料定位试验,研究了双季稻种植制度下长期施肥对红壤性水稻土氮素肥力的影响.结果表明,长期不平衡施肥处理(NK、NP)土壤各氮素含量增加不明显或出现一定幅度的减少;长期平衡施用化肥的NPK处理,土壤各氮素含量均有增长,与CK处理的差异达到显著或极显著水平;无机、有机肥长期配施处理NK+PM、NP+RS、NPK+RS在单施化肥的基础上进一步提高了土壤中氮素养分的含量.双季稻种植制度下,长期平衡施肥,尤其是无机、有机肥配施能极大地增加红壤性水稻土各氮素养分含量,提高土壤氮素肥力,为水稻的高产、稳产和农业可持续发展提供良好的基础和保障.Effect of long-term fertilization on nitrogen fertility of reddish paddy soil under double rice-cropping system was evaluated by setting up seven treatments： CK（no fertilizer applied）, NK （N, K fertilizer）, NP （N, P fertilizer）, NPK （N, P, K fertilizer）, NK＋PM（NK plus pig manure）, NP＋RS （NP plus rice straw） and NPK＋RS （NPK plus rice straw）. Results showed that long-term unbalanced fertilization （NK and NP treatments） resulted in few differences or even certain decrease of the contents of differently-formed nitrogen in soil. The nitrogen content was increased in soil with balanced fertilization treatment of applying N, P and K fertilizers, attaining significantly level at p〈0.05 or p〈0.01. Soil nitrogen fertility was improved obviously in the treatments with combined application of inorganic and organic fertilizers compared to treatments with inorganic fertilizer alone. The long-term balanced fertilization could improve remarkably the soil nitrogen fertility, especially combined application of inorganic and organic fertilizer. The long-term balanced fertilization was an effective measure to ensure the high and stable yield office crop and agricultural sustainability.

关 键 词：双季稻种植制度 长期施肥 红壤 水稻土 氮素肥力 

分 类 号：S143.1[农业科学—肥料学]