放牧强度对土壤水分影响的对应分析 |
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引用本文: | 放牧强度对土壤水分影响的对应分析. 放牧强度对土壤水分影响的对应分析[J]. 畜牧与饲料科学, 2015, 36(8): 1-1. DOI: 10.12160/j.issn.1672-5190.2015.08.001 |
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作者姓名: | 放牧强度对土壤水分影响的对应分析 |
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作者单位: | [1]内蒙古农牧业科学院,内蒙古呼和浩特010031 [2]内蒙古鄂托克旗农业综合开发办公室,内蒙古鄂托克旗016100 [3]内蒙古鄂托克旗农牧业局,内蒙古鄂托克旗016100 |
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基金项目: | 项目来源:内蒙古自治区人才开发基金(短花针茅草原主要优势种群空间分布格局对生态用水的影响);内蒙古科技计划项目(2014牧区饲草的储备及饲喂技术研究,20130216);内蒙古农牧业科学院青年基金(2014QNJJM04);国家牧草产业体系(CARS-35-27);国家公益性行业(农业)科技专项(201303059). |
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摘 要: | 为了解不同放牧利用强度对荒漠草原土壤水分含量的影响,采用随机区组设计,研究轻度(LG)、中度(MG)、重度(HG)放牧对短花针茅荒漠草原土壤水分含量的影响。不同放牧强度的载畜率分别为O.93(LG)、1.82(MG)、2.71(HG)sheep/(hm^2half year),放牧羊只数分别为4、8、12只,放牧期为6个月/年。采用对应分析法比较不同放牧强度下近地表层0~10cm、10~20cm、20~30cm土壤的水分含量。结果表明,不同放牧梯度条件下,土壤含水量总体变化规律为LG〉CK〉MG〉HG.不同土层土壤含水量总体变化规律为0~10cm〉20-30cm〉10-20cm。各放牧强度对总特征值贡献率大小趋势为CK〉MG〉HG〉LG。随着放牧强度的增加,土壤含水量差异明显且呈梯度下降趋势。0-10cm土层土壤含水量受放牧强度的影响最大,其次为10~20cm和20~30cm土层.
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Correspondence Analysis on Effect of Grazing Intensity on Soil Moisture |
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Abstract: | In order to investigate the effect of grazing intensity on soil moisture in desert grassland, the randomized block design method and correspondence analysis method were used to study the influence of lightly grazing (LG), moderate grazing (MG) and highly grazing (HG) on soil moisture in Stipa breviflora desert grassland. The stocking rate of different grazing intensity were 0.93 (LG), 1.82 (MG) and 2.71 (HG) sheep/(hm^2·half year), and the number of grazing sheep was 4 (LG), 8 (MG) and 12 (HG), respectively. The grazing period was six months per year. The results showed that in different grazing intensity, the general change law of soil moisture was LG〉CK〉MG〉HG, and that of the soil moisture in different soillayer was 0-10 cm〉20-30 cm〉10-20 cm. The contribution rate of different grazing intensity on total characteristic value contribution rate was CK〉MG〉HG〉LG. With the increase of grazing intensity, the changes of soil moisture differences showed an obviously gradient descent tendency. The grazing intensity had the greatest impact on soil moisture of 0-10 cm soillayer, followed by 10-20 cm and 20-30 cm. |
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