CAJ | 학술논문

利用土12年长期定位肥料试验,研究了不同施肥方式对耕层土壤全磷(TP)、有机磷(OP)与有效磷(Olsen-P)的影响.结果表明,施用化学磷肥提高了耕层土壤TP、Olsen-P含量,但并未提高OP含量;对照与磷钾处理的OP含量有降低趋势.当基于含氮量施有机肥时,土壤TP和Olsen-P含量大幅度提高,也提高了OP含量,但OP/TP比率在降低到一定程度后维持在一个较为稳定的水平;即使施用有机肥的处理,磷素也主要以无机形态累积.土壤Oben-P与TP或两者的增加量都呈显著线性相关, 土TP每提高100 mg/kg,Oben-P增加量约为20.8 mg/kg,且单位土壤全磷增加带来的Oben-P增加有随施肥时间降低的趋势.在土壤Oben-P含量达到一定水平时应考虑减少磷肥用量.基于有机肥中磷素含量来推荐有机肥施用或延长其施用的时间间隔,将有助于减少由于有机肥施用带来的磷素大量快速累积.
이용토12년장기정위비료시험,연구료불동시비방식대경층토양전린(TP)、유궤린(OP)여유효린(Olsen-P)적영향.결과표명,시용화학린비제고료경층토양TP、Olsen-P함량,단병미제고OP함량;대조여린갑처리적OP함량유강저추세.당기우함담량시유궤비시,토양TP화Olsen-P함량대폭도제고,야제고료OP함량,단OP/TP비솔재강저도일정정도후유지재일개교위은정적수평;즉사시용유궤비적처리,린소야주요이무궤형태루적.토양Oben-P여TP혹량자적증가량도정현저선성상관, 토TP매제고100 mg/kg,Oben-P증가량약위20.8 mg/kg,차단위토양전린증가대래적Oben-P증가유수시비시간강저적추세.재토양Oben-P함량체도일정수평시응고필감소린비용량.기우유궤비중린소함량래추천유궤비시용혹연장기시용적시간간격,장유조우감소유우유궤비시용대래적린소대량쾌속루적.
The investigation of phosphorus status under various management regimes is essential to crop production as well as to minimize the potential impact of P on environment. Changes of soil total phosphorus (TP), organic P (OP), Olsen-P and the relationships between Olson-P and TP were studied under a 12-year long term fertilization experiment in manu-ral lossial soil. The results indicated that soil TP and Olsen-P contents of plough layers were gradually increased by the application of chemical phosphorus fertilizer, while soil OP contents were not increased. Soil OP contents were decreased on plots where no fertilization or only P and K fertilizers were applied, and soil TP and Olsen-P contents were increased rapidly on plots where 2 different rates of dairy manure were applied, which were recommended on the basis of its N con-tent, in addition to the inorganic N, P and K fertilization. OP contents of the manure treatments were elevated to some extent as well, and the ratios of OP to TP were dropped in the beginning years and then are maintained at a stable level. These results showed that accumulation of soil phosphorus was mainly in the form of inorganic even in the treatments with organic manure application. A significant linear correlation between soil TP and Olsen-P or their increments were ob-served. Olsen-P increased amount was about 20.8 mg/kg when soil TP axe increased by 100 mg/kg and the increased ra-tio of Olsen-P to TP were gradually decreased with the history of the fertilization. When soil Olsen-P reaches to a certain level, such as 16 mg/kg, which was a critical value for most of cereal crops, the decreased rate of phosphate application was strongly recommended. As for fields of applying organic manure, the application rate which based on its phosphorus contents is suggested, and this recommendation will help to effectively decrease the rapid build-up of phosphorus pool caused by organic manure application.