摘要
基于红壤性水稻土有机肥长期定位试验,分析了红壤双季稻种植模式下,不施肥、NPK、紫云英+猪粪+化肥、紫云英+猪粪+秸秆+化肥、紫云英+秸秆+化肥处理耕层土壤全磷、Olsen-P、磷素有效性和磷素利用率35年的变化特征,以及Olsen-P与水稻产量的响应关系。结果表明:不施肥处理土壤全磷含量显著降低,有效磷含量及磷素有效性略微下降。配施猪粪显著提高全磷、Olsen-P含量和磷素有效性,但显著降低磷肥利用率,增加磷的环境污染风险。化肥配合紫云英及稻草还田处理土壤全磷、有效磷含量以及磷素有效性保持稳定,但显著提高磷肥利用率。Olsen-P的产量农学阈值为16.36 mg kg^-1。
The long-term organic fertilizer experiment in red paddy soil was conducted to investigate the characteristics of phosphorus(P) availa bility, the utilization efficiency of P fertilizer, and the relationship between Olsen-P and rice yield. Five treatments were selected, including no fertilizer(CK), chemical fertilizers(NPK), milk vetch+ pig manure + chemical fertilizers, milk vetch + pig manure + straw + chemical fertilizers, and milk vetch + straw +chemical fertilizers. Results showed the concentration of total P reduced significantly and the concentration of Olsen-P and P availability reduced slightly in CK treatment. Application with pig manure significantly increased the concentrations of Olsen-P, total P and P availability in paddy soil, but decreased the utilization efficiency of P fertilizer, and increased the risk of P pollution. Combined application of chemical fertilizer with milk vetch and straw significantly increased the utilization efficiency of P fertilizer, and maintained the concentrations of Olsen-P and total-P and P availability. The yield agronomic threshold of Olsen-P was 16.36 mg kg^-1.
作者
叶会财
李大明
柳开楼
余喜初
黄庆海
胡志华
杨旭初
胡惠文
周利军
林小兵
YE Hui-cai;LI Da-ming;LIU Kai-lou;YU Xi-chu;HUANG Qing-hai;HU Zhi-hua;YANG Xu-chu;HU Hui-wen;ZHOU Li-jun;LIN Xiao-bing(Jiangxi Institute of Red Soil, Jinxian 331717, China)
出处
《土壤通报》
CAS
CSCD
北大核心
2019年第2期374-380,共7页
Chinese Journal of Soil Science
基金
江西省水稻产业体系岗位专家项目(JXARS-02-06)
国家重点研发计划资助(2016YFD0200101和2016BBF60109)资助
关键词
红壤性水稻土
全磷
有效磷
有机培肥
Red paddy soil
Total phosphorus
Available phosphorus
Organic fertilization
