CAJ | 학술논문

通过对在采自浙江省金华市的12种不同性质的水稻土添加江西省吴村磷矿粉(WPR)进行淹水培养试验,研究淹水条件下影响磷矿粉溶解和有效性的土壤因素.结果表明,磷矿粉在土壤中的溶解量与土壤pH(KCl)、交换性钙离子含量以及土壤粉粒含量呈极显著或显著的负相关,而与土壤粘粒含量呈显著的正相关.经逐步回归发现,土壤pH(KCl)是影响磷矿粉溶解的第一因素,土壤pH(KCl)和土壤磷吸附常数K共同解释了78%的磷矿粉溶解.加入磷矿粉后土壤有效磷的增加量与土壤的Olsen-P含量呈极显著的正相关.施用磷矿粉后土壤有效磷增加量占溶解量的百分比与土壤Olsen-P含量呈极显著性正相关,而与土壤粘粒含量、最大吸磷量呈显著负相关.
통과대재채자절강성금화시적12충불동성질적수도토첨가강서성오촌린광분(WPR)진행엄수배양시험,연구엄수조건하영향린광분용해화유효성적토양인소.결과표명,린광분재토양중적용해량여토양pH(KCl)、교환성개리자함량이급토양분립함량정겁현저혹현저적부상관,이여토양점립함량정현저적정상관.경축보회귀발현,토양pH(KCl)시영향린광분용해적제일인소,토양pH(KCl)화토양린흡부상수K공동해석료78%적린광분용해.가입린광분후토양유효린적증가량여토양적Olsen-P함량정겁현저적정상관.시용린광분후토양유효린증가량점용해량적백분비여토양Olsen-P함량정겁현저성정상관,이여토양점립함량、최대흡린량정현저부상관.
Two P fertilizer of varying solubility, namely, Wucun phosphate rock (WPR), monocalcium phosphate (MCP), were incubated with twelve flooded paddy soils to quantify factors affecting the dissolution and availability of PR, the twelve paddy soils were sampled from Jinhua, Zhejiang province. Results showed the amounts of WPR dissolution (△NaOH-P) was negatively correlated with soil pH (P＜0.01), exchangeable calcium and soil silt content (P＜0.05), positively correlated with soil clay content (P＜0.05). Stepwise multiple regression indicated that KC1 extractable pH was the soil property that most affected PR dissolution, soil pH and adsorption parameter K together accounted for 78% of the variation in PR dissolution. The increase of soil available P (△Resin-P) after WPR application was positively correlated with soil Olsen-P (P＜0.01).Percentage of △Resin-P by △NaOH-P after WPR application was positively correlated with soil Olsen-P (P＜0.01), negatively correlated with soil clay content and Xm (P＜0.01). Stepwise multiple regression indicated that soil Olsen-P and Xm were the soil properties that mainly affected percentage of △Resin-P by △NaOH-P after WPR application.