| 蒲金涌,姚晓红,胡利平,许彦平,刘彩花,汪丽平.甘肃陇东南紫花苜蓿土壤水分利用程度的评估研究[J].干旱地区农业研究,2006,(2):100~104 |
| 甘肃陇东南紫花苜蓿土壤水分利用程度的评估研究 |
| A study on estimation of water utilization in field of alfalfa in southeast Gansu |
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| DOI：10.7606/j.issn.1000-7601.2006.02.22 |
| 中文关键词: 紫花苜蓿 土壤水分利用 评估 |
| 英文关键词:alfalfa soil water utilization estimation |
| 基金项目:甘肃省科技攻关计划“甘肃干旱生态环境对全球气候变暖的响应及减灾技术的研究”(2GS042-A44-017)； 中国气象局兰州干旱气象研究所开放实验室基金资助 |
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| 中文摘要: |
| 通过种植试验分析,用数理统计方法模拟了紫花苜蓿生物量累积过程及土壤水分消耗过程,揭示了紫花苜蓿的生物量累积特点及其土壤水分利用规律。发现1年生紫花苜蓿在开花期物质累积以地上为主,干物质上/下比可达2.92;开花以后逐渐以地下部分为主,到收刈期干物质上/下比为0.57。紫花苜蓿的田间贮水量小于粮食作物,耗水量大于粮食作物。紫花苜蓿的土壤利用率大于粮食作物,是小麦的2.12.8倍,玉米的2.02.5倍。 |
| 英文摘要: |
| Based on the results of experiments,the process of biomass accumulation and soil water consumption of alfalfa has been simulated with mathematical statistical method,so as to find the character of its accumulated biomass and the law of soil water utilization.It was discovered: before blooming,the accumulation of biomass of first-year alfalfa was mainly concentrated in the above-ground part,and the ratio of above-ground to underground dry matter was 2.92;but after blooming,the accumulation of biomass was turned mainly to the underground part,and the ratio of above-ground to underground dry matter was 0.57.The soil water storage in the field of alfalfa was less than that of grain crops,and the water consumption in the field of alfalfa was larger than that of grain crops.The rate of soil water utilization of alfalfa was 2.1 to 2.8 times that of wheat,and 2.0 to 2.5 times that of corn. |
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