本文選題：比水容量 + 土壤容重��； 參考：《土壤通報》2016年04期

【摘要】：基于砂壤黃土的室內(nèi)土壤水分特征曲線系列試驗(yàn),討論了砂壤黃土比水容量對Gardner經(jīng)驗(yàn)?zāi)Ｐ偷倪m用性,重點(diǎn)分析Gardner經(jīng)驗(yàn)?zāi)Ｐ蛥?shù)對土壤容重變化的敏感性。試驗(yàn)結(jié)果表明:Gardner比水容量經(jīng)驗(yàn)?zāi)Ｐ蛯ι叭傈S土具有很好的適用性,擬合的決定系數(shù)R2均達(dá)到0.97以上,具有較好的擬合效果;在低吸力段,比水容量隨著土壤干容重的增大而增大,增幅明顯;在中、高吸力段,比水容量隨著土壤干容重的增大而趨于平緩,因此砂壤黃土容重變異對比水容量的影響主要集中于低吸力段;表征比水容量的Gardner經(jīng)驗(yàn)?zāi)Ｐ偷膬蓚�參數(shù)A和B中,參數(shù)A的敏感度mA遠(yuǎn)大于參數(shù)B的敏感度mB,土壤容重變異是參數(shù)A的敏感因素,參數(shù)B的非敏感因素,比水容量曲線參數(shù)A、B均與容重變異同方向變化。
[Abstract]:Based on a series of experiments on soil moisture characteristic curves of sandy soil loess, the applicability of specific water capacity of sandy soil loess to Gardner empirical model was discussed, and the sensitivity of Gardner empirical model parameters to soil bulk density variation was analyzed.The experimental results show that the empirical model of specific water capacity of 1: Gardner has a good applicability to sandy soil loess, and the fitting coefficient R2 is more than 0.97, which has a good fitting effect in the low suction section.The specific water capacity increases with the increase of soil dry bulk density, while in the middle and high suction section, the specific water capacity tends to be flat with the increase of soil dry bulk density.Therefore, the effect of bulk density variation of sandy soil loess on water capacity is mainly concentrated in the low suction section, and in the two parameters A and B of the Gardner empirical model, which characterizes the specific water capacity.The sensitivity of parameter A was much higher than that of parameter B. the variation of soil bulk density was the sensitive factor of parameter A.
【作者單位】： 太原理工大學(xué);
【基金】：國家自然科學(xué)基金項(xiàng)目(40671081) 山西省地面灌溉節(jié)水技術(shù)參數(shù)手冊研編(2015-JS-1)資助
【分類號】：S152.5

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