發(fā)布時間：2018-07-20 08:55

【摘要】：利用土壤水分速測儀,獲得黑河上游天老池流域2014年5-9月祁連圓柏林、灌木林、青海云杉林3個坡面0~60 cm土壤深度坡面土壤貯水量,通過時間穩(wěn)定性分析,研究該區(qū)域坡面尺度的時間穩(wěn)定性特征.結(jié)果表明:土壤貯水量的季節(jié)變化趨勢與降雨動態(tài)基本一致,坡向和植被類型共同影響著土壤水分的空間分布.累積概率分析認(rèn)為祁連圓柏林的時間穩(wěn)定性最高.通過平均相對偏差、平均相對偏差的標(biāo)準(zhǔn)差、時間穩(wěn)定性指數(shù)、平均絕對偏差誤差確定了坡面土壤水分平均狀態(tài)的代表性測點(diǎn).3個坡面土壤貯水量的Spearman秩相關(guān)系數(shù)基本都在P0.01的水平上顯著,具有強(qiáng)烈的時間穩(wěn)定性,Spearman秩相關(guān)系數(shù)為分析區(qū)域土壤貯水量的時間穩(wěn)定性分析提供了便捷途徑.
[Abstract]:By using the soil moisture speedometer, the soil water storage on the slope with 0 ~ 60cm depth on Qilian round Berlin, shrub forest and Picea crassifolia forest was obtained from May to September 2014 in Tianlaochi Basin, upper reaches of Heihe River, and the time stability analysis was carried out. The temporal stability characteristics of slope scale in this area are studied. The results showed that the seasonal variation trend of soil water storage was basically consistent with rainfall dynamics, and slope direction and vegetation type affected the spatial distribution of soil water. The cumulative probability analysis shows that the Qilian circle Berlin has the highest time stability. Through the mean relative deviation, the standard deviation of the average relative deviation, the time stability index, The mean absolute deviation error determined the representative measuring points of the average soil water state on the slope. The Spearman rank correlation coefficient of the soil water storage on the three slopes was significant at the level of P0.01. The Spearman rank correlation coefficient with strong temporal stability provides a convenient way to analyze the temporal stability of regional soil water storage.
【作者單位】： 蘭州大學(xué)生命科學(xué)學(xué)院;
【基金】：國家自然科學(xué)基金集成項(xiàng)目(91425301)
【分類號】：S152.7

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1 信秀麗;張佳寶;朱安寧;;土壤水吸力空間分布規(guī)律的時間穩(wěn)定性研究[J];農(nóng)業(yè)工程學(xué)報;2008年05期

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