西北中药产区土壤有机碳空间分布的控制因素1

IF 2.1 Q3 SOIL SCIENCE
M. He, Liang Tang, Cheng-yi Li, Jianxin Ren
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引用次数: 0

摘要

土壤有机碳是影响中药材种植和生产的重要因素。本研究旨在揭示甘肃陇西县土壤有机碳密度的空间分布以及气候和地形因素的影响。2018年对200个采样点的土壤有机碳(SOC)进行了采集和分析。结果显示,总SOCD为26.7±10.2 Mg ha-1,而土壤深度为0–10、10–30和30–50 cm的SOCD分别为6.3±1.7、11.0±3.8和9.3±4.8 Mg ha-2。各土层的温度、降水量、海拔和水力指数与SOCD呈显著相关。随着土壤深度的增加,坡度、起伏幅度、表面粗糙度和SOCD之间的相关性逐渐降低。从中部平原到山区,SOCD随着海拔的升高而增加,而由流域形成的河谷平原则表现出较低的SOCD水平。因此,科学管理土壤肥力,发展精准农业,结合测土施肥配方,将保证中药材种植的健康发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Factors controlling the spatial distribution of soil organic carbon in the Chinese medicine producing area of NW China 1
Soil organic carbon is an important factor for the cultivation and production of traditional Chinese medicine. This study aimed to reveal the spatial distribution of the soil organic carbon density (SOCD) and the effects of the climatic and topographic factors in Longxi County (Gansu Province, China). The soil organic carbon (SOC) from 200 sampling points were collected and analyzed in 2018. Results showed that the total SOCD was 26.7 ± 10.2 Mg ha-1, while the SOCDs at a soil depth of 0–10, 10–30, and 30–50 cm were 6.3 ± 1.7, 11.0 ± 3.8, and 9.3 ± 4.8 Mg ha-1, respectively. The temperature, precipitation, elevation, and stream power index showed significant correlations with the SOCD at each soil layer. With an increasing soil depth, the correlation between the slope, relief amplitude, surface roughness, and SOCD gradually decreased. From the central plains to the mountainous areas, the SOCD increased with rising elevation, while the valley plain that formed by the river basin showed low levels of SOCD. Therefore, the scientific management of soil fertility and the development of precision agriculture, combined in a soil testing fertilization formula, will guarantee the healthy development of the Chinese herbal medicine planting.
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1.90
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