本文選題：孔隙度　切入點：壓力　出處：《農(nóng)業(yè)工程學報》2017年01期 　論文類型：期刊論文

【摘要】：為了明晰氣壓深松土壤孔隙度的變化規(guī)律及其效果,利用溫納電阻率法測試氣壓深松前、后的土壤孔隙度,并以孔隙度增加率為指標進行分析,結果表明:深松氣壓和水平距離對孔隙度增加率有極顯著影響(P0.01),而犁底層容重沒有顯著影響;水平距離0.7 m內(nèi)的土壤孔隙度增大,犁底層孔隙度增加率隨水平距離增加呈現(xiàn)先緩慢變化在0.4 m處出現(xiàn)峰值后,急速減小的變化趨勢,水平距離0.1~0.4 m的孔隙度增加率均值顯著大于0.5~0.6 m的孔隙度增加率均值(P0.05);深松氣壓2.2和1.8 MPa作用下的犁底層孔隙度增加率差異不顯著,但均顯著大于1.4 MPa作用下的犁底層孔隙度增加率(P0.05),1.8 MPa為最佳深松氣壓。結論可為氣壓深松技術及其設備的研發(fā)提供依據(jù)。
[Abstract]:In order to understand the variation law of soil porosity and its effect, the porosity of soil before and after deep air pressure relaxation was measured by Winner resistivity method, and the porosity increase rate was used as an index to analyze it. The results showed that the porosity increase rate was significantly affected by deep pressure and horizontal distance, but not by the bulk density of plow bottom layer, and the soil porosity increased within 0.7 m from horizontal distance. With the increase of horizontal distance, the increase rate of porosity in the bottom layer of plough showed a trend of slow change at first and then a peak value at 0.4 m, and then a rapid decrease. The average porosity increase rate of 0. 1 ~ 0. 4 m from horizontal distance is significantly larger than that of 0. 5 ~ 0. 6 m porosity increase rate (P0. 05), but there is no significant difference in the porosity increase rate of plough bottom layer under the action of 2. 2 and 1. 8 MPa deep loosening pressure. But the increase rate of porosity of plow bottom under the action of 1. 4 MPa was significantly higher than that of 1. 4 MPa. P0. 05 ~ 1. 8 MPa was the best pressure for deep loosening. Conclusion it can provide the basis for the research and development of air pressure deep loosening technology and its equipment.
【作者單位】： 東北農(nóng)業(yè)大學工程學院;黑龍江科技大學機械工程學院;
【基金】：國家科技支撐計劃課題(2014BAD06B04)
【分類號】：S152.9

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相關期刊論文 前10條

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本文編號：1584821