Chinese Agricultural Science Bulletin ›› 2004, Vol. 20 ›› Issue (3): 159-159.
• 目次 • Previous Articles Next Articles
Sun Weihong , Lao Xiurong , Wei Zhiqiang
Online:
Published:
Abstract: Study was carried out on fluvo-aquic soil of low fertility coming from Huanghe River plain for 18 years. The research of potassium forms applied a chemical analytic method. The results show that the straw returning combination to fertility improves release of slow-release K and available K, and availability of mineral K. As straw application rate at the range of 2250、4500、6750kg hm-2,soil non-exchangeable K, water soluble K, specifically absorbed K and non-specifically absorbed K are all positively related to the amount of straw remarkably, while mineral K is negatively correlative. The variant regularity of soil K is that non-exchangeable K and specifically absorbed K are increasing, but the other forms of K are decreasing.
Sun Weihong , Lao Xiurong , Wei Zhiqiang. Effect of Long-term Straw Combination to Fertility on Potassium Forms[J]. Chinese Agricultural Science Bulletin, 2004, 20(3): 159-159.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: https://www.casb.org.cn/EN/
https://www.casb.org.cn/EN/Y2004/V20/I3/159