本文選題：土壤水分特征曲線 + 振動(dòng)深松　； 參考：《灌溉排水學(xué)報(bào)》2017年05期

【摘要】：為了探討振動(dòng)深松耕作措施對(duì)不同類型土壤的水分特征曲線的影響,利用吸力平板儀和壓力膜儀對(duì)黑龍江省5種典型土壤,即黑土、黑鈣土、水稻土、蘇打鹽堿土、沙土進(jìn)行了測定。得到振動(dòng)深松區(qū)和對(duì)照區(qū)的原狀土壤在脫濕過程中不同吸力下的土壤含水率,并利用van Genuchten數(shù)學(xué)模型對(duì)5種土壤的水分特征曲線的實(shí)測值進(jìn)行數(shù)值擬合,對(duì)比研究了5種土壤水分特征曲線及模型擬合參數(shù)、土壤當(dāng)量孔徑、土壤水分有效性及比水容量的變化。結(jié)果表明,振動(dòng)深松前后土壤水分特征曲線差異顯著。同一吸力下,深松區(qū)土壤含水率高于對(duì)照區(qū),振動(dòng)深松顯著提高了土壤的有效供水能力,其中效果最佳的是蘇打鹽堿土和黑土。振動(dòng)深松通過改善土壤結(jié)構(gòu),調(diào)整了孔隙孔徑的比例,進(jìn)而提高了土體的有效供水能力。
[Abstract]:In order to study the effect of vibratory deep loosening tillage on water characteristic curves of different types of soils, five typical soils in Heilongjiang Province, namely black soil, calcareous soil, paddy soil and soda saline soil, were treated by suction plate instrument and pressure film instrument. Sand was determined. The soil moisture content of the undisturbed soil under different suction in the process of dehumidification was obtained in the vibratory deep loose area and the control area, and the measured values of the five soil moisture characteristic curves were fitted numerically by van Genuchten mathematical model. The changes of soil water characteristic curves and model fitting parameters, soil equivalent pore size, soil water availability and specific water capacity were compared and studied. The results showed that the difference of soil moisture characteristic curve was significant before and after deep vibration loosening. Under the same suction, the soil moisture content in the deep pine area was higher than that in the control area, and vibration deep loosening significantly improved the effective water supply capacity of the soil, among which the soda-alkali soil and the black soil had the best effect. By improving soil structure and adjusting the proportion of pore diameter, vibration deep loosening can improve the effective water supply capacity of soil.
【作者單位】： 東北農(nóng)業(yè)大學(xué)水利與建筑學(xué)院;黑龍江省水利科學(xué)研究院;
【基金】：“十二五”國家科技支撐計(jì)劃項(xiàng)目(2012BAD08B05) 水利部948計(jì)劃項(xiàng)目(201121)
【分類號(hào)】：S152.7

【相似文獻(xiàn)】

相關(guān)期刊論文 前5條

1 莊季屏,王偉;土壤低吸力段持水性能及其與早期土壤干旱的關(guān)系研究[J];土壤學(xué)報(bào);1986年04期

2 馬愛生;劉思春;呂家瓏;權(quán)定國;郭文龍;趙懿;;黃土高原地區(qū)幾種土壤的水分狀況與能量水平[J];西北農(nóng)林科技大學(xué)學(xué)報(bào)(自然科學(xué)版);2005年11期

3 栗現(xiàn)文;周金龍;靳孟貴;劉延鋒;;高礦化度土壤水分特征曲線及擬合模型適宜性[J];農(nóng)業(yè)工程學(xué)報(bào);2012年13期

4 程?hào)|會(huì);王文科;李威;王會(huì);;風(fēng)積砂非飽和水力參數(shù)研究[J];安徽農(nóng)業(yè)科學(xué);2010年10期

5 ;[J];;年期

，

本文編號(hào)：1946500