首页 > 过刊浏览>2024年第43卷第6期 >210-218. DOI:10.13300/j.cnki.hnlkxb.2024.06.020
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不同平茬模式对柠条细根构型及土壤养分的影响
作者:
作者单位:

1.内蒙古农业大学沙漠治理学院，呼和浩特 010018;2.内蒙古自治区水利事业发展中心，呼和浩特 010020;3.翁牛特旗水利事业发展中心，赤峰 024500;4.准格尔旗水利事业发展中心，鄂尔多斯 017100

作者简介:

张志强，E-mail：sui15104950895@163.com

通讯作者:

郭月峰，E-mail：guoyuefeng0525@126.com

中图分类号:

S728.2

基金项目:

内蒙古自治区关键技术攻关计划项目（2021GG0085）；内蒙古自治区直属高校基本科研业务费项目（BR22-15-01）


Effects of stumping modes on configuration of fine root and nutrients in soil of Caragana korshinskii
Author:
Affiliation:

1.College of Desert Management， Inner Mongolia Agricultural University， Hohhot 010018， China;2.Department of Soil and Water Conservation， Inner Mongolia Water Conservancy Development Center， Hohhot 010020， China;3.Ongniud Banner Water Conservancy Development Center， Chifeng 024500， China;4.Zhungeer Banner Water Conservancy Development Center， Erdos017100， China

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    摘要:

    为探讨不同平茬模式下柠条细根构型及土壤养分的变化规律，以内蒙古包头市达茂旗17年生柠条（Caragana korshinskii）人工林为研究对象，分析平茬（0、10、20 cm）和未平茬（CK）处理下柠条人工林细根构型和土壤养分等指标变化。结果显示，土壤有机质、速效氮、有效磷及速效钾均在10 cm平茬模式下含量最高；不同平茬模式下细根均为典型的鱼尾形分支结构，且10 cm平茬模式有效改善了根系分支结构，增强了次级分支生长；不同平茬模式下柠条细根总根长、比根长、组织密度、干物质含量均在10 cm平茬模式下最优；隶属函数综合分析结果显示，平茬10 cm（0.58）>平茬0 cm（0.46）>平茬20 cm（0.44）>未平茬（0.42）。以上结果表明，10 cm平茬模式对柠条更新复壮效果最好，有利于促进生态脆弱区水土保持以及生态环境可持续发展。

    Abstract:

    The 17-year-old forest of Caragana korshinskii in Damao Banner， Baotou City， Inner Mongolia was used to study the rule of changes in the configuration of fine root and the nutrients in soil of Caragana korshinskii under different stumping modes. The changes in the configuration of fine root and the nutrients in soil of artificial forests of Caragana korshinskii under treatments of stumping with 0 cm， 10 cm， and 20 cm and non-stumping （CK）. The results showed that the content of soil organic matter （SOM）， available nitrogen （AN）， available phosphorus （AP）， and available potassium （AK） in soil was the highest in the mode of stumping with 10 cm. The fine roots under different stumping modes had a typical fishtail-shaped branching structure， and the mode of stumping with 10 cm effectively improved the root branching structure and enhanced the growth of secondary branches. The total root length， specific root length， tissue density， and the content of dry matter in fine roots of Caragana korshinskii all were the best under the mode of stumping with 10 cm. The results of comprehensive analysis of membership function showed that the decreasing order was stumping with 10 cm （0.58）>stumping with 0 cm （0.46）>stumping with 20 cm （0.44）>no stubble （0.42）. It is indicated that the mode of stumping with 10 cm has the best effect on the regeneration and rejuvenation of Caragana korshinskii， which is conducive to promoting the conservation of soil and water and the sustainable development of the ecological environment in ecologically fragile areas.

    图1 根系拓扑结构示意图Fig.1 Schematic diagram of root topology
    图2 根系分级示意图Fig.2 Schematic diagram of root grading
    图3 不同平茬模式及不同土层深度土壤养分含量Fig.3 Soil nutrient content under different stumping modes and different soil depths
    图4 细根总根长空间分布Fig.4 Spatial distribution of total fine root length
    图5 不同平茬模式细根比根长变化Fig.5 Changes of specific root length of fine roots under different stumping modes
    图6 不同平茬模式细根组织密度变化Fig.6 Changes of fine root tissue density in different stumping modes
    图7 不同平茬模式细根干物质含量变化Fig.7 Changes of fine root dry matter content under different stumping modes
    表 1 不同平茬模式处理下柠条细根拓扑指数Table 1 Topological index of fine roots of Caragana korshinskii under different stumping modes
    表 2 各指标隶属函数法综合评价Table 2 Comprehensive evaluation of the membership function method of each index
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张志强,郭月峰,祁伟,卜繁靖,刘科.不同平茬模式对柠条细根构型及土壤养分的影响[J].华中农业大学学报,2024,43(6):210-218

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  • 收稿日期:2024-03-12
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