长期不同耕作对白浆土磷素状况的影响

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，本文对长期定位16年的白浆土进行了研究，试验结果表明研究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，其磷组分除LOP含量减少外，其余磷组分均增加。深松与常规耕作处理土壤磷组分除Ca2-P外，其他磷组分的变化趋势相同。因此我们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。

Effects of long-term Tillage on phosphorus in Albic Soil

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 has been studied, Test results show that effects of different tillage on total phosphorus and available phosphorus is far less than fertilization.Effects of different tillage on phosphorus in soil is interior to fertiliza- tion.No-tillage is more beneficial to accumulate soil total phosphorus than deep and conservation tillage, but isn’t beneficial to accumulate soil available phosphorus,of the phosphorus forms of all are increased, except for LOP; In the treatment of deep and conservation tillage, apart from Ca2-P, the variation tendency of other forms is same. Therefore, we can improve the situation of soil phosphorus fertilizer by taking the measures of different farming in addition to fertilization.