摘要
国内外对磷素的长期试验大多定位在施肥上,而耕作对其影响的研究很少,为探明耕作对土壤磷素状况的影响,对长期定位16年的白浆土进行了研究。试验结果表明不同耕作方式对土壤全磷、有效磷的影响远远小于施肥,免耕较深松、常规耕作更有利于土壤全磷的积累,但不利于有效磷的增加;不同的耕作处理对土壤无机磷总量和有机磷总量也产生不同的影响,但影响不大,各处理无机磷组分中Al-P、Fe-P和O-P增加,有机磷组分中土壤活性有机磷含量减少,深松与常规耕作处理中土壤磷组分除Ca2-P外,其他磷组分的变化趋势相同。免耕处理中活性较差的磷组分有所增加如Ca8-P和Ca10-P中稳性有机磷和高稳性有机磷,因此在改善土壤磷素状况方面除了采用施肥措施外,还可以考虑采用不同的耕作方式来调节土壤磷素营养。
Phosphorus at home and abroad for the long-term positioning was located in most of the trial on fertilization, and the research of the effects of tillage was not many. In this paper the long-term 16-year Albic soil had been studied, Test results showed that effects of different tillage on total phosphorus and available phosphorus was far less than fertilization. Effects of different tillage on phosphorus in soil were interior to fertilization. No-tillage was more beneficial to accumulate soil total phosphorus than deep and conservation tillage, but wasn＇t beneficial to accumulate soil available phosphorus. The phosphorus forms of all were increased, except for LOP; in the treatment of deep and conservation tillage, apart from Ca2-P, the variation tendency of other forms was same. Therefore, we can improve the situation of soil phosphorus fertilizer by taking the measures of different farming in addition to fertilization.
出处
《中国农学通报》
CSCD
北大核心
2009年第11期98-101,共4页
Chinese Agricultural Science Bulletin
基金
黑龙江省教委项目"白浆土利用与改良长期综合试验"(9541068)
关键词
长期耕作
白浆土
磷
long-term tillage, albic soil, phosphorus
