CAJ | 학술논문

比较了国内外常用的3种结构改良剂（聚丙烯酰胺、β-环糊精和腐殖酸）对促进粉砂质涂地土壤水稳定性团聚体形成的效果，分析了应用结构改良剂对土壤养分供应能力的影响。结果表明，施用3种结构改良剂均可在一定程度上促进水稳定性团聚体的形成，水稳定性团聚体的数量随改良剂用量增加而增加。3种改良剂对水稳定性团聚体的改良效果由高至低顺次为：聚丙烯酰胺>β-环糊精>腐殖酸。聚丙烯酰胺和β-环糊精的适用量以0.20%为宜。施用腐殖酸对土壤氮、磷、钾养分供应影响不明显；但聚丙烯酰胺和β-环糊精可明显改变土壤养分的供应状况。对于施肥后再施用改良剂的土壤，土壤释放养分的能力有一定的减弱；而对于施改良剂后再施肥料，土壤对化肥中养分的吸持能力减弱，供肥能力增加。
비교료국내외상용적3충결구개량제（취병희선알、β-배호정화부식산）대촉진분사질도지토양수은정성단취체형성적효과，분석료응용결구개량제대토양양분공응능력적영향。결과표명，시용3충결구개량제균가재일정정도상촉진수은정성단취체적형성，수은정성단취체적수량수개량제용량증가이증가。3충개량제대수은정성단취체적개량효과유고지저순차위：취병희선알>β-배호정>부식산。취병희선알화β-배호정적괄용량이0.20%위의。시용부식산대토양담、린、갑양분공응영향불명현；단취병희선알화β-배호정가명현개변토양양분적공응상황。대우시비후재시용개량제적토양，토양석방양분적능력유일정적감약；이대우시개량제후재시비료，토양대화비중양분적흡지능력감약，공비능력증가。
A pot incubation experiment was conducted to compare the effects of three structure modifiers (polyacrylamide, β-cyclodextrin, and humic acid), used widely at home and abroad, on formation of water-stable aggregates and supply capacity of nutrients in a silty coastal soil. The result showed that application of each of three structure modifiers could improve the formation of water-stable aggregates in the soil, and the amounts of>0.25 mm water-stable aggregates in the soil increased with increasing the rates of the modifiers. The improved effects decreased in the order of polyacrylamide > β-cyclodextrin > humic acid. The optimal dosage of polyacrylamide and β-cyclodextrin for modifying soil structure was about 0.20%. Application of humic acid had no significant effect on supply capacity of nutrients in the soil. However, application of polyacrylamide andβ-cyclodextrin could change supply capacity of nutrients in the soil. The soil, added with modifiers after application of chemical fertilizers, had weaker supply capacity of nutrients as compared with control without application of any amendments. While the soil, added with chemical fertilizers after application of modifiers, had stronger supply capacity of nutrients as compared with control.