| 本文已被：浏览 362次 下载 24次 |
码上扫一扫！ |
| 大兴安岭耕地土壤类型肥力评价及其养分空间分异 |
|
王海兵1,2,3, 杨皓钦1, 李思琪1, 李晔祺1, 刘权文1, 何佩林1, 齐智伟4
|
|
1.内蒙古农业大学 沙漠治理学院，内蒙古 呼和浩特 010018;2.内蒙古农业大学 旱区水工程生态环境全国重点实验室，内蒙古 呼和浩特 010018;3.内蒙古自治区风沙物理与防沙治沙工程重点实验室，内蒙古 呼和浩特 010018;4.锡林郭勒盟林业和草原资源监测保障中心，内蒙古 锡林郭勒 026000
|
|
| 摘要: |
| 【 目的】探明大兴安岭地区不同耕地土壤类型的理化性质差异、养分垂直分布规律及肥力空间格局，为区域耕地分类管理和精准施肥提供科学依据。【 方法】采用网格布点与典型剖面相结合的方法，在大兴安岭地区设置110个采样点，覆盖暗棕壤、栗钙土、棕壤、棕色针叶林土、沼泽土、潮土、灰色森林土、草甸土、褐土、风沙土、黑土和 黑钙土等12种土壤类型，分别采集0-10，10-20，20-30和30-40 cm土层样品，测定土壤粒度组成、pH值、电导率、 有机质、全氮、速效磷和速效钾含量，计算各个类型土壤的肥力指数（soil fertility index，SFI），并分析SFI的空间分布格 局和土壤理化性质与 SFI 的相关性。【 结果】大兴安岭地区12类耕地0-40 cm土层土壤的粒径累积分布曲线整体呈 典型“ S”型，且各类型间差异明显。其中潮土、黑钙土、栗钙土、黑土的平均黏粒含量较高，潮土、栗钙土和草甸土的平 均粉粒含量较高，灰色森林土、沼泽土和棕色针叶林土的平均砂粒含量较高。在0-40 cm土层，随着土层深度的增加， 不同类型土壤的pH值、电导率以及有机质、全氮、速效磷和速效钾含量有明显差异，其中有机质和全氮含量在20-30 cm土层相对较高，所有土层速效磷含量总体较低。SFI空间分布呈“北高南低、中部优于边缘”格局，沼泽土、灰色森林 土和黑土的SFI标准化值位居前三，分别为76.49，70.96和66.81，棕壤最低（39.93）。相关性分析结果表明，SFI标准 化值与有机质和全氮呈极显著正相关（P<0.01），而与速效养分含量相关性较低。【 结论】大兴安岭耕地中的各个类型土壤的肥力空间分布差异较大，有机质和全氮是影响土壤肥力的关键因子。 |
| 关键词: 耕地 土壤肥力 空间变异 土壤分类 大兴安岭 |
| DOI：10. 13207/j. jnwafu. 2026. 08. 015 |
| 分类号: |
| 基金项目:内蒙古自治区教育专项资金项目（2025）；内蒙古农业大学旱区水工程生态环境全国重点实验室项目（SQ2024SKL08048） |
|
| Fertility evaluation and spatial variation of soil nutrients in cultivated land of the Greater Khingan Mountains |
|
WANG Haibing1,2,3, YANG Haoqin1, LI Siqi1, LI Yeqi1, LIU Quanwen1, HE Peilin1, QI Zhiwei4
|
|
1.College of Desert Control Science and Engineering，Inner Mongolia Agricultural University，Hohhot，Inner Mongolia 010018，China;2.State Key Laboratory of Water Engineering Ecology and Environment in Arid Area，Inner Mongolia Agricultural
University，Hohhot，Inner Mongolia 010018，China;3.Inner Mongolia Key Laboratory of Aeolian Physics and Desertification Control Engineering，Hohhot，Inner Mongolia 010018，China;4.Xilingol League Forestry and Grassland Resources Monitoring and Support Center，Xilingol，Inner Mongolia 026000，China
|
| Abstract: |
| 【 Objective】This research aims to explore the differences in physical and chemical properties，vertical distribution of nutrients and spatial pattern of fertility of different soil types in the Greater Khingan Mountains，to provide scientific basis for classification management and precise fertilization of regional cultivated land. 【Method】The combining method of grid distribution and typical profiles was adopted，and 110 sampling points were set up in Greater Khingan Mountains area. 12 soil types were covered，including dark brown soil，chestnut soil，brown soil，brown coniferous forest soil，swamp soil，fluvo-aquic soil，gray forest soil，meadow soil，cinnamon soil，aeolian sandy soil，black soil and chernozem. Soil samples were collected from 0-10，10-20，20-30 and 30-40 cm soil layers，respectively. The soil particle size composition，pH value，electrical conductivity，organic matter，total nitrogen，available phosphorus and available potassium content were determined，and the soil fertility index（SFI） of each soil type was calculated. The spatial distribution pattern of SFI and the correlation between soil physical and chemical properties and SFI were analyzed.【Result】The cumulative distribution curve of particle size in 0-40 cm soil layer of 12 types of cultivated land in Greater Khingan Mountains showed a typical“ S”-shaped pattern，with significant differences among different types. Among them，the average clay content of fluvo-aquic soil，chernozem，chestnut soil and black soil was relatively high，the average silt content of fluvo-aquic soil，chestnut soil and meadow soil was relatively high，and the average sand content of grey forest soil，swamp soil and brown coniferous forest soil was relatively high. In the 0-40 cm soil layer，the pH value，electrical conductivity and the contents of organic matter，total nitrogen，available phosphorus and available potassium in different types of soil significantly varied with increasing soil depth. And the contents of organic matter and total nitrogen were relatively high in the 20-30 cm soil layer. The content of available phosphorus was generally low in all soil layers. The spatial distribution of SFI showed a pattern of‘ high in the north and low in the south，better in the middle than in the edge’. The standardized SFI values of swamp soil（76.49），gray forest soil（70.96） and black soil（66.81） ranked the top three，and that of brown soil was the lowest（39.93）.The results of correlation analysis showed that the standardized SFI was significantly positively correlated with organic matter and total nitrogen（P<0. 01），while its correlation with available nutrient content was relatively low.【Conclusion】The spatial distribution of soil fertility in different types of cultivated land in Greater Khingan Mountains shows significant difference. Organic matter and total nitrogen are the key factors affecting soil fertility. |
| Key words: cultivated land soil fertility spatial variation soil classification Greater Khingan Mountains |
