摘要
在碳酸盐褐土上9年的试验结果表明：持续施用低量磷肥即施肥量与作物收获磷量相当、可缓慢提高土壤速效磷的浓度，并最终稳定在接近土壤“不缺磷”水平，但不能使土壤建立较大的有效磷库。只有在结合80％收获产品喂饲-堆腐回田的施肥制度后则可达到这一目的。猪粪中的磷与化肥磷对于改善土壤有效磷库的作用相似。每年小剂量较之每6年一次大剂量施磷更有利于提高土壤速效磷和活性磷的浓度并有利于提高肥料残磷进入Ca2-P库的比率。
The results from a nine-year field experiment on a carbonate cinnamon soil indicated that the continuous low-input of phosphorus fertilizer with 14.4 kgP/ha annually could slighy increase soil Olsen-P and labile-P to the level asunon-deficiency'of phosphorus but far from setting up a large available phosphorus pool. The application of phosphorus fertilizer combined with recycled phosphorus from pig manure every year seemed to be able to set up a large available phosphorus pool finally. The role of phosphorus in pig manure was similar to that of fertilizer phosphorus in improving soil available phosphorus pool. However, the application of phosphorus every year with low dose was much better in increasing soil Olsen-P,labile-P and Ca2-P than the treatment with high dose onee every six years.
出处
《土壤学报》
CAS
CSCD
北大核心
1997年第1期81-88,共8页
Acta Pedologica Sinica
基金
国家自然科学基金
