不同轮次头花蓼种植地土壤营养状况变化研究

探讨了未种植头花蓼、种植过1轮头花蓼、种植过2轮头花蓼的种植土壤中PH值和主要营养物质如有机质、水溶性盐、速效钾、全钾、全氮、有效氮、全磷、有效磷的变化情况,发现随着头花蓼的种植轮次变化,土壤营养状况均出现不同程度的变化,其中土壤中PH值、有机质含量、速效钾、全氮、全磷量变化较大;有机质、速效钾和全氮之间存在着显著的相关性,有效磷和有效氮之间也存在显著的相关性。因而在头花蓼种植中要注意补充磷肥、要注意控制土壤PH值,要考虑适当施用氮肥,尽量避免因PH降低等问题出现而导致的头花蓼连作减产问题。

Discuss the changes of soil nutritionin 0 planting times 、1 planting times and 2 planting times of Polygonum capitatum Buch.-Ham. ex D. Don planting. The changes of main nutrients such as organic matter, water soluble salt, potassium, total potassium, total nitrogen, available nitrogen, total phosphorus,available phosphorus.There is a significant correlation between organic matter, total N and available K.There is a significant correlation between available phosphorus and available nitrogen. We note to add fertilizer and control soil PH that the problem of the Polygonum production down will be avoid.