杨麦间作系统中树木对土壤3种形态磷淋溶的影响

金梅娟; 褚军; 侍昊; 薛建辉; 吴永波; 庄雪青; 孙嘉曼

doi:10.3969/j.issn.1000-2006.2015.02.006

金梅娟,褚军,侍昊,薛建辉,吴永波,庄雪青,孙嘉曼

南京林业大学学报（自然科学版） ›› 2015, Vol. 39 ›› Issue (02) : 33-39.

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南京林业大学学报（自然科学版） ›› 2015, Vol. 39 ›› Issue (02) : 33-39. DOI: 10.3969/j.issn.1000-2006.2015.02.006

研究论文

杨麦间作系统中树木对土壤3种形态磷淋溶的影响

金梅娟^1,2,褚军^1,2,侍昊³,薛建辉^1,2*,吴永波^1,2,庄雪青^1,2,孙嘉曼^1,2

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Effects of poplar-wheat intercropping systems on three forms of phosphorus in soil eluvial water

JIN Meijuan^1,2, CHU Jun^1,2, SHI Hao³, XUE Jianhui^1,2*, WU Yongbo^1,2, ZHUANG Xueqing^1,2, SUN Jiaman^1,2

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摘要

采用田间试验的方法,研究了杨麦间作系统中树木对土壤磷素淋溶流失的影响,设定株行距分别为:2 m×5 m(L_Ⅰ)、2 m×15 m(L_Ⅱ)的2种密度间作系统以及单作小麦地(CK),测定距地表60 cm深处淋溶液体积与淋溶液总磷(TP)、可溶性总磷(TDP)以及总颗粒附着态磷(PP)的质量浓度及其淋失量。结果表明:① 2 种密度间作模式对淋溶液体积控制效果优劣均为:L_Ⅰ、L_Ⅱ、CK。在同一间作密度(L_Ⅱ)下,距离杨树越近,淋溶液体积降低越明显。② 2 种密度间作模式对淋溶液中TP、TDP以及PP质量浓度控制效果优劣均为:L_Ⅰ、L_Ⅱ、CK。在同一间作密度(L_Ⅱ)下,距离杨树越近,淋溶液中3 种形态磷质量浓度降低越明显。③ 土壤淋溶液中磷素流失形态以TDP为主。间作密度越高,距离杨树越近,淋溶液中TP、TDP以及PP流失量就越低。实验表明,株行距为2 m×5 m(L_Ⅰ)的间作系统对农田土壤磷淋溶的削减作用较强。

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_Ⅰ. 2 m×5 m, L_Ⅱ. 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_Ⅰ> L_Ⅱ> 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_Ⅰ> L_Ⅱ> 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 L_Ⅰwas presented as the optimum phosphorus alleviation effects. All these results provided an important reference for the construction of agroforestry systems.

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金梅娟,褚军,侍昊,薛建辉,吴永波,庄雪青,孙嘉曼. 杨麦间作系统中树木对土壤3种形态磷淋溶的影响[J]. 南京林业大学学报（自然科学版）. 2015, 39(02): 33-39 https://doi.org/10.3969/j.issn.1000-2006.2015.02.006

JIN Meijuan, CHU Jun, SHI Hao, XUE Jianhui, WU Yongbo, ZHUANG Xueqing, SUN Jiaman. Effects of poplar-wheat intercropping systems on three forms of phosphorus in soil eluvial water[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2015, 39(02): 33-39 https://doi.org/10.3969/j.issn.1000-2006.2015.02.006

中图分类号： S718 S714

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基金

收稿日期:2014-03-10 修回日期:2014-04-10
基金项目:江苏省高校自然科学研究重大项目(12KJA180003); 国家林业公益性行业科研专项项目(201104002); 江苏高校优势学科建设工程资助项目(PAPD); 江苏省普通高校研究生科研创新计划项目(CXZZ13_0513)
第一作者:金梅娟,硕士生。*通信作者:薛建辉,教授。E-mail: jhxue@njfu.edu.cn。
引文格式:金梅娟,褚军,侍昊,等. 杨麦间作系统中树木对土壤3种形态磷淋溶的影响[J]. 南京林业大学学报:自然科学版,2015,39(2):33-39.