不同平茬模式对柠条细根构型及土壤养分的影响
Effects of stumping modes on configuration of fine root and nutrients in soil of Caragana korshinskii
张志强 1郭月峰 1祁伟 2卜繁靖 3刘科4
作者信息
- 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
- 折叠
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 high-est in the mode of stumping with 10 cm.The fine roots under different stumping modes had a typical fish-tail-shaped branching structure,and the mode of stumping with 10 cm effectively improved the root branch-ing 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 conser-vation of soil and water and the sustainable development of the ecological environment in ecologically frag-ile areas.
关键词
柠条/平茬/细根构型/拓扑结构Key words
Caragana korshinskii/stumping/configuration of fine root/topological structure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据