摘要
在典型砂姜黑土上的六年定位试验证明:每年亩施圈肥2500~5000kg,可显著提高土壤有机质含量,全氮和速效氮有所增加,速效磷含量增高;在各种磷酸盐形态中,铝磷酸盐含量明显增加。施用圈肥的处理,耕层土壤容重降低,有效水含量显著提高,土壤持水曲线与对照处理有明显差别。施用氮磷化肥和无肥对照区,土壤有机质含量没有明显下降,说明砂姜黑土的土壤有机质分解速度是缓慢的。单纯施用氮磷化肥,第一年小麦增产幅度较大,以后小麦产量逐年下降。同时施用圈肥和氮磷化肥,小麦产量逐年呈上升趋势。
The fixed site experiments on the typical lime concretion black soil(LCBS) were carried out for 6 years. The results indicated that yard manure application of 2500-5000 kg/mu/year increased significantly the content of organic matter(OM), total N, rapidly-available N and P. Among the various types of phosphates,Al - P content was raised obviously, the soil volume weight in cultivated layers was lowered and available water content was raised by the manure application.The curve of soil water-holding differed noticeably from that of control.Compared with ck (no fertilization) , the soil OM content decreased insignificantly by continuous application of N and P fertilizers for 6 years. This suggested a slow decomposition of OM in LCBS.The application of N or P fertilizers alone didn't increase wheat yield distinctly,even almost no effects could be noted with the advancing of time. However, the combined application of N and P fertilizers increased wheat yield significantly. The mixture of manure and fertilizer not only resulted in high wheat yield in successive years but also improved the fertility of the soil.
出处
《华北农学报》
CSCD
北大核心
1992年第4期78-84,共7页
Acta Agriculturae Boreali-Sinica
关键词
砂姜黑土
土壤改良
培肥
有机质
Lime concretion black Soilsoil
improvement
Increasing fertility
Organic matter
Soil available water
Soil water holding capacity curve
Wheat