| 宁夏典型天然草地土壤有机碳及其活性组分变化特征 |
| |
| 引用本文： | 季波,何建龙,吴旭东,王占军,谢应忠,蒋齐.宁夏典型天然草地土壤有机碳及其活性组分变化特征[J].草业学报,2021,30(1):24-35. |
| |
| 作者姓名： | 季波 何建龙 吴旭东 王占军 谢应忠 蒋齐 |
| |
| 作者单位： | 1.宁夏大学农学院，宁夏 银川 750021;2.宁夏农林科学院荒漠化治理研究所，宁夏 银川 750002;3.宁夏防沙治沙与水土保持重点实验室，宁夏 银川 750002 |
| |
| 基金项目： | 自治区农业科技自主创新专项全产业链创新示范项目;宁夏农林科学院科技平台建设提升项目 |
| |
| 摘 要： | 为探寻宁夏典型温性天然草地土壤有机碳及活性组分变异及储量特征,以宁夏4种典型的天然草地(温性草甸草原、温性草原、温性草原化荒漠和温性荒漠草原)为研究对象,采用野外调查和室内分析相结合的方法,对宁夏全区49个固定监测点,土壤有机碳及其活性有机碳组分(易氧化有机碳、微生物生物量碳和水溶性有机碳)进行采样和室内分析.结果表明...
|
| 关 键 词： | 宁夏 天然草地 土壤有机碳 土壤活性有机碳 |
| 收稿时间： | 2020-06-30 |
| 修稿时间： | 2020-09-08 |
Characteristics of soil organic carbon and active organic carbon in typical natural grassland in Ningxia |
| |
| JI Bo,HE Jian-long,WU Xu-dong,WANG Zhan-jun,XIE Ying-zhong,JIANG Qi.Characteristics of soil organic carbon and active organic carbon in typical natural grassland in Ningxia[J].Acta Prataculturae Sinica,2021,30(1):24-35. |
| |
| Authors: | JI Bo HE Jian-long WU Xu-dong WANG Zhan-jun XIE Ying-zhong JIANG Qi |
| |
| Institution: | 1.College of Agriculture，Ningxia University，Yinchuan 750021，China;2.Institute of Desert Manage，Ningxia Agriculture and Forestry Science Academy，Yinchuan 750002，China;3.Key Laboratory of Desertification Control and Soil & Water Conservation of Ningxia，Yinchuan 750002，China |
| |
| Abstract: | This research explored the variation and characteristics of soil carbon components across four major types of natural grassland （meadow steppe， warm steppe， steppe desert and desert steppe） in Ningxia typical temperate natural grassland. The carbon components were investigated soil organic carbon and active organic carbon （readily oxidized organic carbon， microbial biomass carbon and dissolved organic carbon） at 49 fixed sites， using both survey and direct sampling methods. It was found that soil organic carbon contents to 40 cm soil depth were， respectively， 34.23， 12.84， 5.76 and 3.82 g·kg-1， and the soil organic carbon storage was， respectively， 13.43， 5.75， 2.58 and 2.29 kg·m-2 in the four natural grassland categories. For the four grassland categories， the readily oxidized organic carbon content ranged from 0.75-7.43 g·kg-1， microbial biomass carbon content ranged from 102.52-554.77 mg·kg-1， and dissolved organic carbon content ranged from 69.66-89.61 mg·kg-1. The overall ranking was meadow steppe>warm steppe>steppe desert>desert steppe. The levels of readily oxidized organic carbon storage were 2.56， 1.44， 0.62 and 0.48 kg·m-2， respectively； soil microbial biomass carbon storage was 218.31， 170.50， 81.99 and 68.26 g·m-2， respectively， with meadow steppe significantly higher than the other grassland types （P<0.05）. The soil dissolved organic carbon storage was 34.36， 35.21， 37.22 and 43.14 g·m-2， respectively， and the value for desert steppe was significantly larger than the other grassland types （P<0.05）. The range of values in the four grassland types for readily oxidized organic carbon was18.42%-29.72%， with the warm steppe being the highest. The range of values for microbial biomass carbon was 1.54%-3.83%， and meadow steppe grassland was the lowest. The range of values for dissolved organic carbon was 0.23%-2.01%， with ranking desert steppe>steppe desert>warm steppe>meadow steppe， and with significant differences （P<0.05） between the four grassland types. Soil organic carbon storage showed a significant （P<0.05） or extremely significant （P<0.01） positive correlation with soil readily oxidized organic carbon storage， microbial biomass carbon storage， total nitrogen， total phosphorus and total potassium， and showed significant （P<0.05） or extremely significant （P<0.01） negative correlation with soil dissolved organic carbon storage， soil bulk density and pH values. In summary， soil organic carbon stability was lowest in desert grassland， while the activity and bioavailability of the soil organic carbon pool in warm grassland was the highest. The importance of the soil organic carbon storage of natural grassland in Ningxia should not be underestimated. |
| |
| Keywords: | Ningxia natural grassland soil organic carbon soil active organic carbon |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《草业学报》浏览原始摘要信息 |
| 点击此处可从《草业学报》下载免费的PDF全文 |
