本文選題：華北落葉松坡面 + 土壤含水量��； 參考：《水土保持學(xué)報》2017年01期

【摘要】：在寧夏六盤山選擇華北落葉松林坡面,利用TRIME-PICO土壤水分測定儀,在2015年5—11月對48個測點分12次測定了不同厚度土層(0—20,0—40,0—60cm)的體積含水量的時間動態(tài),并采用累積概率函數(shù)、相對偏差及Spearman秩相關(guān)系數(shù)等方法,分析評價了坡面土壤體積含水量的時間穩(wěn)定性。結(jié)果表明:土壤體積含水量在時間和空間上均存在中等變異,且變異程度隨土層加厚而逐漸降低,表現(xiàn)為0—40,0—60cm土層體積含水量的累積概率在干旱和濕潤2種極端條件下的變化均小于0—20cm土層。0—20,0—40,0—60cm土層體積含水量的平均相對偏差的變化范圍分別為(-43.5%)~(47.9%),(-42.9%)~(49.9%)和(-46.9%)~(40.0%);平均相對偏差的標(biāo)準(zhǔn)差(SDRD)呈現(xiàn)出隨土層加厚而逐漸降低的變化趨勢,在0—20,0—40,0—60cm土層依次為11.1%,8.3%,7.8%。在整個研究期間,Spearman秩相關(guān)系數(shù)在不同土層厚度條件下始終保持較高水平(0.7以上),且呈極顯著相關(guān),坡面上不同土層的體積含水量具有較高的時間穩(wěn)定性�；谕寥篮康臅r間穩(wěn)定性特征,確定了研究坡面上不同土層厚度的體積含水量平均值的代表性測點,可利用這些代表性測點的土壤體積含水量測定值估計相應(yīng)土層厚度的坡面平均值。
[Abstract]:On the slope of Larix gmelinii forest in Liupanshan, Ningxia, the time dynamics of volume water content of different thickness soil layers (0-20 0 ~ 40 ~ 60 cm) were measured by TRIME-PICO soil moisture measurement instrument in 12 times for 48 sites in May and November 2015. The cumulative probability function, relative deviation and Spearman rank correlation coefficient were used to analyze and evaluate the temporal stability of soil volume water content on slope surface. The results showed that there was moderate variation in soil volume water content in time and space, and the degree of variation decreased gradually with the soil layer thickening. The cumulative probability of soil volume water content in 0-40 ~ 60 cm soil layer is smaller than that in 0-20cm soil layer. 0 ~ 20 ~ 0 ~ 40 ~ 40 ~ 60 cm soil layer under two extreme conditions of drought and wetting. The variation range of average relative deviation of volume water content in 0-20 ~ 40 ~ 60 cm soil layer is smaller than that in 0-20cm soil layer. The standard deviation of the mean relative deviation (SDRD) decreased gradually with the thickening of the soil layer, and the standard deviation of the average relative deviation (SDRDs) decreased gradually with the thickening of the soil layer, and 42.9% and 49.9%, respectively, and the standard deviation of the average relative deviation decreased gradually with the thickening of the soil layer, and the standard deviation of the average relative deviation decreased gradually with the thickening of the soil layer. In the 0-20 ~ 400-60 cm soil layer, 11.1and 8.3and 7.8cm in turn. During the whole study period, the Spearman rank correlation coefficient always maintained a higher level than 0.7 under different soil thickness conditions, and showed a significant correlation, and the volume water content of different soil layers on the slope had higher time stability. Based on the temporal stability characteristics of soil water content, the representative measuring points of the average volume water content of different soil layers on the slope are determined. The soil volume water content of these representative sites can be used to estimate the slope average of the corresponding soil thickness.
【作者單位】： 中國林業(yè)科學(xué)研究院森林生態(tài)環(huán)境與保護研究所國家林業(yè)局森林生態(tài)環(huán)境重點實驗室;北京林業(yè)大學(xué)水土保持學(xué)院;
【基金】：國家自然科學(xué)基金項目(41471029,41390461,41230852) 科技部科技基礎(chǔ)性工作專項(2014FY120700);科技部“十二五”農(nóng)村領(lǐng)域國家科技計劃項目(2012BAD22B030102) 國家林業(yè)局寧夏六盤山森林生態(tài)站和寧夏回族自治區(qū)生態(tài)修復(fù)與多功能林業(yè)綜合研究中心項目
【分類號】：S714.2

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