基于无机多孔改良剂设施蔬菜板结土壤复退研究.doc

　　基于无机多孔改良剂的设施蔬菜板结土壤复退研究 xxx 　　摘要：g/cm3，低于CK容重（1.31-1.39g/cm3），孔隙度随着泡沫砂体积的增加而增加，泡沫砂改良剂能够明显改善土壤通气结构。 　　关键词： The Research of Hardened Vegetable Soil Improvement Based on an Inorganic Porous Amendment Abstract: Due to the high intensity of human activity, the soil became compacted easily with greenhouse vegetable cultivation, which affects the quantity and quality of vegetables, so it has important realistic meaning to repair and improve the compacted soil. Traditional methods cannot achieve long-term improvement, just like fertilizing organic fertilizer, which has low timeless effect, and mixing sand, which has inefficiency and bad effect. Therefore, the issue came up with a new idea that through the inorganic porous conditioner called foam sand to change soil structure, achieving the soil improvement. Firstly, collect the greenhouse soil with serious soil harden and degeneration and mixed them with foam sand according to the proportionality; then, put them into the greenhouse as greenhouse watering simulation; after that, collect the ring cutter, and measure the index changes, to discuss the foam sand’s effect of soil physical structure improvement. The results showed 0-5cm soil layers had significant difference, which had good improvement obviously, because these layers had less effect than 5-10cm’s on natural setting while experiment. The decrease tendency of soil moisture suggested that T1 (a=0.18) decrease more slowly than T2 (a=0.20) and CK (a=0.22). Foam sand had effect on water holding capacity, and the amelioration extent had negative correlation with porosity. T2’s bulk density was 1.05-1.18 g/cm3, which was lower than CK’s (1.31-1.39g/cm3). Foam sand modified agent can improve the soil arability structure significantly, and the porosity increase with the increase of foam sand volume. Keywords: Foam Sand; Improvement; Vegetable Greenhouse; Water Retention; Breathability; Porosity  目 录 摘要 I 关键词 I Abstract II Keywords II 目 录 III 1 引言 1 2 国内外研究现状 1 2