论文

枣粮间作生态系统土壤氮素水平分布特性研究

  • 尹飞 ,
  • 李佩艳 ,
  • 李友军 ,
  • 付国占
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  • 1. 河南科技大学, 农学院, 河南洛阳 471003;
    2. 河南科技大学, 食品与生物工程学院, 河南洛阳 471003
尹飞(1978-),男,河南安阳人,讲师,博士,主要从事旱作农业和农田生态系统可持续管理研究.

收稿日期: 2008-08-11

  网络出版日期: 2014-10-14

基金资助

国家重点基础研究发展计划(2005CB121106);河南科技大学博士科研启动基金(09001273)

Horizontal Distribution Characteristics of Soil Nitrogen in Jujube-crop Intercropping Ecosystem

  • YIN Fei ,
  • LI Pei-yan ,
  • LI You-jun ,
  • FU Guo-zhan
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  • 1. College of Agronomy, Henan University of Science and Technology, Luoyang 471003, China;
    2. College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003, China

Received date: 2008-08-11

  Online published: 2014-10-14

摘要

基于枣粮间作复合生态系统内部异质性,通过在系统内不同位置采样,分析了枣粮间作系统内土壤氮素水平分布特性.结果表明:①枣粮间作生态系统中,在小麦收获期和玉米收获期两个时期,土壤全氮和硝态氮含量均存在明显的水平变异性.土壤全氮含量在距枣行1~6. m范围内,随着与枣行距离的缩短,呈先增加后降低的变化趋势,最高值出现在距枣行3 m处.土壤硝态氮含量随着与枣行距离的缩短而迅速增加.而土壤铵态氮含量极低且没有明显的水平变异;②氮素施用量对土壤全氮和硝态氮空间变异有正向作用,而植株对氮的吸收利用可以降低土壤氮素分布空间差异程度.各因子对土壤全氮空间变异影响强弱顺序为氮吸收量>氮素施用量>土壤含水量;对土壤硝态氮空间变异影响强弱顺序为氮素施用量>土壤全氮含量>氮素吸收量>土壤含水量.

本文引用格式

尹飞 , 李佩艳 , 李友军 , 付国占 . 枣粮间作生态系统土壤氮素水平分布特性研究[J]. 华北农学报, 2009 , 24(4) : 129 -133 . DOI: 10.7668/hbnxb.2009.04.026

Abstract

In order to understand the horizontal heterogeneity of soil nitrogen in the jujube2crop intercropping ecosys2 tem(J IE),the experiment was carried out at village Dashujin,Nanpi County,Hebei Province during 2005 - 2006. The soil samples were collected from different site in J IE,i1e10125,2,3,415 and 615 m away from the jujube row to determine the horizontal distribution characteristics of soil total nitrogen (TN),nitrate nitrogen (NO3 - 2N) and ammonium nitrogen (NH4 +2N). The results showed that the horizontal variances of soil TN and NO3 - 2N distribution were obvious at harvest stages of wheat and maize in J IE,but the distribution of soil NH4 +2N had no obvious horizontal variance.When the dis2 tance to the jujube tree row(JTR) decreased from 6. 5 m to 1 m,the soil TN concentration increased first and then de2 creased,and the highest soil TN concentration came from the 3 m sampling site. However,the NO3 - 2N concentration in2 creased rapidly along with the shortened distance to JTR. The results also showed that fertilizer application rate had a great positive effect on the horizontal variances of soil TN and NO3 - 2N,whereas N uptake had a negative effect on them. The main factor affecting the spatial variance of soil TN was N uptake,followed by N application rate and soil water content, while the order of affecting the spatial variance of soil NO3 - 2N was N application rate > soil TN concentration > N uptake > soil water content.

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