| 半干旱黄土丘陵区白羊草人工草地生产力和土壤水分特征研究 |
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| 引用本文： | 徐炳成,山仑. 半干旱黄土丘陵区白羊草人工草地生产力和土壤水分特征研究[J]. 草业科学, 2004, 21(6): 6-10 |
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| 作者姓名： | 徐炳成 山仑 |
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| 作者单位： | 中国科学院,水利部水土保持研究所,西北农林科技大学,陕西,杨陵,712100;中国科学院,水利部水土保持研究所,西北农林科技大学,陕西,杨陵,712100 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家重点实验室基金，中国科学院前沿领域研究基金 |
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| 摘 要： | 对半干旱黄土丘陵区不同立地条件下白羊草Bothriochloa ischaemum人工草地的生产力与土壤水分状况进行比较研究.结果表明,人工栽培驯化利用可以显著提高白羊草草地的生产力(至少较天然草地增产20%),其人工栽培草地在川地的生产力显著高于山坡地(约为山坡地的3倍).川地人工草地在维持高生产力的情况下,260 cm以下土壤层出现雨季期间及休闲期后均不能够得到水分补偿而稳定在低湿层.
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| 关 键 词： | 白羊草 人工草地 生产力 土壤水分 黄土丘陵区 |
| 文章编号： | 1001-0629(2004)06-0006-05 |
Aboveground productivity and soil water characteristics of cultivated Old World bluestem grassland in semi-arid loess hilly-gully areas on the Loess Plateau |
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| XU Bing-cheng,SHAN Lun Institute of Soil and Water Conservation,Chinese Academy of Sciences,Ministry of Water Resources,Northwest Sci-Tech University of Agriculture and Forestry,Yangling ,China). Aboveground productivity and soil water characteristics of cultivated Old World bluestem grassland in semi-arid loess hilly-gully areas on the Loess Plateau[J]. Pratacultural Science, 2004, 21(6): 6-10 |
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| Authors: | XU Bing-cheng SHAN Lun Institute of Soil Water Conservation Chinese Academy of Sciences Ministry of Water Resources Northwest Sci-Tech University of Agriculture Forestry Yangling China) |
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| Affiliation: | XU Bing-cheng,SHAN Lun Institute of Soil and Water Conservation,Chinese Academy of Sciences,Ministry of Water Resources,Northwest Sci-Tech University of Agriculture and Forestry,Yangling 712100,China) |
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| Abstract: | Yearly and seasonal changes in aboveground biomass and soil water of cultivated Old World bluestem (Bothriochloa ischaemum) grasslands in different habitats were compared. The results showed that Old World bluestem had great adaptability to dry-slope land as indicated by seasonal biomass cumulation. The productivity of Old World bluestem grassland was significantly improved by artificial cultivation, with a minimum increase of 20% over natural grassland. The productivity of cultivated grassland on river land was about 3 times that on sloping land. With productivity of cultivated grassland maintained at a high level on river land, soil water in the soil layer below 260 cm, which is usually maintained at 5.0% yearly, could not be renewed after rainy and fallow seasons. |
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| Keywords: | Bothriochloa ischaemum cultivated grassland productivity soil water loess hilly-gully areas |
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