本文選題：聚丙烯酸鈉 + 土壤導(dǎo)水率��； 參考：《干旱地區(qū)農(nóng)業(yè)研究》2017年02期

【摘要】：聚丙烯酸鈉作為保水劑的一種,在農(nóng)業(yè)應(yīng)用中能夠防止水土流失,改善土壤水分狀況,促進(jìn)作物增產(chǎn),提高作物品質(zhì)。通過室內(nèi)試驗分析了聚丙烯酸鈉的釋水特征及土壤中混施不同比例(0、0.3%、0.5%、1%和1.5%)聚丙烯酸鈉對土壤飽和導(dǎo)水率、收縮比和緊實度的影響。研究結(jié)果表明,聚丙烯酸鈉釋水與混施土壤后釋水存在較大差異,100%聚丙烯酸鈉在1.5 MPa吸力條件下能保持46.4%的水分,而在干土中可以快速100%的釋放水分;隨著土壤聚丙烯酸鈉用量的增加,土壤透水性急劇降低,均勻混施達(dá)到1%時,飽和導(dǎo)水率接近0 m·d~(-1);干燥后土壤緊實度和收縮比增加,導(dǎo)致聚丙烯酸鈉的農(nóng)業(yè)應(yīng)用也存在一定的潛在風(fēng)險。
[Abstract]:As a water-retaining agent, sodium polyacrylate can prevent soil erosion, improve soil moisture status, increase crop yield and improve crop quality in agricultural application.The characteristics of water release of sodium polyacrylate and the effects of mixed application of 0. 3% and 0. 3% of sodium polyacrylate on saturated water conductivity, shrinkage ratio and compactness of soil were analyzed in laboratory.The results showed that there was a great difference between sodium polyacrylate release and mixed application of soil water release. 100% sodium polyacrylate could keep 46.4% water under the condition of 1.5 MPa suction, but it could release 100% water quickly in dry soil.With the increase of the amount of sodium polyacrylate, the water permeability of the soil decreased sharply, and the saturated water conductivity was close to 0 mg / d ~ (-1) when mixed evenly, and the compactness and shrinkage ratio of the soil increased after drying.The agricultural application of sodium polyacrylate also has some potential risks.
【作者單位】： 中國農(nóng)業(yè)科學(xué)院農(nóng)業(yè)環(huán)境與可持續(xù)發(fā)展研究所;中國科學(xué)院地理科學(xué)與資源研究所;
【基金】：農(nóng)業(yè)部公益性行業(yè)專項(201503116) 國家自然科學(xué)基金課題(51309211) 863課題(2011AA100503)
【分類號】：S152;S482.99

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