[1]张明忠,朱红业,沙毓沧,等.金沙江干热河谷草被凋落物的分解率与持水性能[J].水土保持研究,2010,17(02):156-159.
　ZHANG Ming-zhong,ZHU Hong-ye,SHA Yu-cang,et al.Grass Litter Decomposition Rate and Water-Holding Capacity in Dry-hot Valley of Jinshajiang River[J].Research of Soil and Water Conservation,2010,17(02):156-159.
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金沙江干热河谷草被凋落物的分解率与持水性能

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 17 期数: 2010年02期 页码: 156-159 栏目: 出版日期: 2010-04-20
Title:
Grass Litter Decomposition Rate and Water-Holding Capacity in Dry-hot Valley of Jinshajiang River
作者:
张明忠1, 朱红业2, 沙毓沧1, 张映翠3, 金杰1, 史亮涛1, 龙会英1, 纪中华1
1. 云南省农业科学院 热区生态农业研究所, 云南 元谋 651300;
2. 云南省农业科学院 科研管理处, 昆明 650231;
3. 云南烟草公司 楚雄州分公司烟草科学研究所, 云南 楚雄 675000
Author(s):
ZHANG Ming-zhong1, ZHU Hong-ye2, SHA Yu-cang1, ZHANG Ying-cui3, JIN Jie1, SHI Liang-tao1, LONG Hui-ying1, JI Zhong-hua1
1. Research Institute for Tropical Eco-agricultural sciences, Yunnan, Aunademy of Agriculture Sciences, Yuanmou Ynnan 651300, China;
2. Science and Technological Division, Yunnan Academy of Agricultural Sciences, Kunming 650231, China;
3. Research Institute for Tobacco Agricultural Scinces, Chuxiong Corporation, Yunnan Tobacco, Chuxiong, Yunnan 675000, China
关键词:
草被凋落物; 干热河谷; 分解率; 持水性能
Keywords:
grass litter; dry-hot river valley; decomposition rate; water-holding capacity
分类号:
S812
摘要:
以新诺顿豆、铺地木蓝、百喜草、扭黄茅、双花草、孔颖草凋落物为材料，研究了6种草被凋落物在金沙江干热河谷地区的分解率和持水性能。结果表明：草被凋落物干物质剩余量随时间进程而减少，但不与分解时间呈直接相关性。这主要受气候、凋落物特性、微生物和土壤动物的影响，气候（温度、湿度）是最主要的影响因素。草被凋落物饱和持水量从高到低排列依次为新诺顿豆（336%）、百喜草（248%）、扭黄茅（209%）、孔颖草（206%）、铺地木蓝（174%）、双花草（168%）；凋落物分解到第24个月时，其干物质剩余量从少到多排列依次为新诺顿豆（16.19%）、铺地木蓝（26.38%）、孔颖草（32.79%）、百喜草（37.62%）、扭黄茅（39.72%）、双花草（39.76%）。新诺顿豆的凋落物分解率和持水性能都最高，对促进草地土壤发育和改良有着重要的意义，具有重要的水土保持作用。
Abstract:
The litter plays an important role in nutrient cycling and energy flow in grass ecosystems. The decomposition rate and water-holding capacity of 6 kinds of grass litter were studied in the Jinshajing river dry-hot valley. The results showed that the dry weight remains reduced with time but didn’t have the direct correlation with time. The decomposition of litters was affected by climate, character of litter, animalcule and soil animal. The climate factors of temperature and humidity were important especially. The water-holding capacity was in sequence of N. wightii (336%), P. notatum Flugge (248%), H. contortus (L.) Beauv (209%), B. pertusa (L.) A.Camus(206%), I. endecaphylla Jacq (174%), D. annulatum (Forsk.) Stapf (168%). After 24 months decomposition, the remaining dry weight of the litter was in sequence as follows: 16.19% for N. wightii, 26.38% for I. endecaphylla Jacq, 32.79% for B. pertusa (L.) A. Camus, 37.62% for P. notatum Flugge, 39.72% for H. contortus (L.) Beauv and 39.76% for D. annulatum (Forsk.) Stapf. The decomposition rate and water-holding capacity of N. wightii are at the highest level. It is important for the development, improvement and conservation of the grassland soil.

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备注/Memo

收稿日期:2009-9-22。
基金项目:国家“十一五”科技支撑计划“长江中上游西南山区退化生态系统综合整治技术研究” 课题（2006BAC01A11）；国家科技支撑计划“长江上游坡耕地整治与高效生态农业关键技术试验示范”项目；“横断山民族聚居区坡耕地植物篱建设与特色生物资源开发及示范”课题（2008BAD98B06）
作者简介:张明忠（1976- ），男，云南元谋人，助理研究员，主要从事热区生态环境与草地农业研究。E-mail：ymzmz2002_621@sina.com
通讯作者:纪

更新日期/Last Update: 1900-01-01