期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
Soil Nutrient Variance by Slope Position in a Mollisol Farmland Area of Northeast China 被引量:6
1
作者 ZHANG Shaoliang JIANG Lili +3 位作者 LIU Xiaobing ZHANG Xingyi fu shicong DAI Lin 《Chinese Geographical Science》 SCIE CSCD 2016年第4期508-517,共10页
In order to generate scientifically-based comparative information to improve fertilization efficiency and reduce nutrient loss, 610 samples of 122 soil profiles were collected at the 0–60 cm depth to compare soil nut... In order to generate scientifically-based comparative information to improve fertilization efficiency and reduce nutrient loss, 610 samples of 122 soil profiles were collected at the 0–60 cm depth to compare soil nutrient contents including soil organic matter(SOM), total nitrogen(TN), total phosphorus(TP), available phosphorus(AP), and available potassium(AK) among different slope positions in a Mollisol farmland area of Northeast China. The contents of SOM and TN typically decreased with increased soil depth at back and bottom slope. Soil loss and deposition tended to decrease SOM and TN at the 0–20 cm soil depth on both the back slope and the slope bottom. The TP firstly decreased from 0–20 cm to 30–40 cm, and then not constantly increased at the back slope and the bottom slope. Due to the characteristics of soil nutrients and crop absorption, the contents of both AP and AK were typically the highest at the summit, followed by the slope bottom and the back slope in the 0–20 cm layer. Generally, in order to sustain the high soil productivity and protect the environment, attention should be paid to soil conservation on back slope; in addition, additional N and P fertilizer is necessary on the back slope. 展开更多
关键词 土壤养分变异 黑土区 耕地面积 坡位 东北 中国 土壤有机质 土层深度
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部