宁夏枸杞园土壤养分资源与枸杞根系形态调查  

Investigation on the distribution of wolfberry roots and soil nutrients in wolfberry orchard of Ningxia

作　　者：赵营[1] 罗建航[1] 陈晓群[1] 张学军[1] 

机构地区：[1]宁夏农林科学院农业资源与环境研究所,宁夏银川750002

出　　处：《干旱地区农业研究》2008年第1期47-50,57,共5页Agricultural Research in the Arid Areas

基　　金：宁夏回族自治区科技攻关项目(05GG-10601)

摘　　要：2005年4月，在宁夏中宁和园林场以不同树龄的宁杞1号构杞树作为研究对象，采用田间定点调查取样与室内分析的方法，对构杞园土壤养分资源及构杞根系形态特征进行调查与分析。结果表明：中宁构杞园土壤养分平均含量明显高于基本农田，速效养分平均含量是基本农田的1．6～2．0倍；园林场或中宁，不同树龄构杞树土壤有机质、全氮、全磷和速效养分都主要集中在0～30cm的土体范围内；园林场构杞树根系随着其树龄增加，主、须根长及根冠直径都呈增加趋势，中宁树龄3年的构杞树的主、须根数小于树龄6年以上构杞树；不同树龄的构杞树根系都主要分布在0～35cm的土体范围内，与土壤养分的主要分布范围一致。说明构杞园农民施肥方法不合理，造成根系分布的不合理。In April 2005, two investigation sites were selected in Yuanlin Proving Ground of Academy of Agriculture and Forestry Sciences of Ningxia and Tiantan of Zhongning County, respectively. A method with field investigation and chemical analysis in lab was carried out to study the roots distribution of different aged wolfberry and soil nutrients in wolfberry orchard. The wolfberry species was Ningqi No. 1, and we chose wolfberry trees with different age to investigate their root distribution, at the same time, soil sample was collected for chemical analysis. The results showed that the average soil nutrients content in wolfberry orchard was greater than cropland in Zhongning, and that of soil available nutrients content was 1.6--2.0 times of cropland. In Yuanlin Proving Ground or Zhongning, the soil organic matter, total N, total P and available nutrients for differently aged wolfberry trees were mainly concentrated in 0--30 cm soil depth. The length of taproots or fibrous roots and tree-crown diameter for wolfberry increased with tree age increasing in Yuanlin Proving Ground. The number of taproots or fibrous roots for 3-year-old wolfberry tree was less than that of 6- or 9-year-old tree in Zhongning. The soil depth of root distribution for differently-aged wolfberry tree was mainly ranged from 0 to 35 cm, which was in coincidence with the accumulation depth （0-30 cm） of soil nutrients. That is to say, the farmer＇s unreasonable fertilization method in wolfberry orchard caused unreasonable distribution of root.

关 键 词：构杞园 土壤养分 根系分布 

分 类 号：S153.6[农业科学—土壤学] S56[农业科学—农业基础科学]