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杨麦间作系统中树木对土壤3种形态磷淋溶的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2015年02期
Page:
33-39
Column:
研究论文
publishdate:
2015-04-01

Article Info:/Info

Title:
Effects of poplar-wheat intercropping systems on three forms of phosphorus in soil eluvial water
Article ID:
1000-2006(2015)02-0033-07
Author(s):
JIN Meijuan12 CHU Jun12 SHI Hao3 XUE Jianhui12* WU Yongbo12 ZHUANG Xueqing12 SUN Jiaman12
1.Co-Innovotion Center for the Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China;
2.Jiangsu Key Laboratory of Forestry Ecological Engineering,College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037,China;
3.Jiangsu Province Environmental Monitoring Center, Nanjing 210036,China
Keywords:
poplar-wheat intercropping leaching phosphorus loss TP TDP PP
Classification number :
S718; S714
DOI:
10.3969/j.issn.1000-2006.2015.02.006
Document Code:
A
Abstract:
Farmland phosphorus loss is one of the important factors that lead to the water pollution of Tai Lake area. Study on the characters of farmland phosphorus loss in Tai Lake area is of great significance. In the present study,the characters of soil phosphorus element loss were investigated based on field experiments from two types of poplar-wheat intercropping systems(spacing: L. 2 m×5 m, L. 2 m×15 m respectively)during November,2012 to June,2013. The volume, concentration and leaching loss of TP, TDP and PP in soil eluvial water at 60cm depth of different intercropping systems were measured after each precipitation events. The results showed the followings:① The control effects of the soil leaching volume could be ordered as L> L> CK. The volume declined obviously when the sampling point near the poplar tree under the same density. ② The control effects of the concentrations of TP,TDP,PP could be ordered as:L> L> CK. The concentration increased with the increasing distance from the poplar tree. ③ TDP was the main form of phosphorus loss in soil eluvial water. Larger intercropping spacing and closer distance from the polar tree had better effects on alleviating the leaching loss of TP,TDP and PP. Within the scope of this study,the alleviated effects of Lwas presented as the optimum phosphorus alleviation effects. All these results provided an important reference for the construction of agroforestry systems.

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Last Update: 2015-03-31