有机结合态磷肥的生物有效性研究

Study of Bioavailability of Organic Combined State Phosphatic Fertilizers

通过玉米盆栽试验，并用传统无机磷肥作为对比，比较了新型有机结合态磷肥OP1（淀粉基磷肥）和OP3（秸秆基磷肥）的生物有效性。试验结果表明：新型有机结合态磷肥在改善玉米长势、增加植株含磷量和吸磷量、提高肥料利用率上的效果明显优于无机磷肥。与磷酸二氢钙相比，有机结合态磷肥可提高玉米含磷量16．8％～40．0％和玉米吸磷量约1．0倍，可提高磷利用率1．60～2．70倍；与焦磷酸钠相比，有机结合态磷肥可提高玉米吸磷量41．9％和玉米含磷量29．6％，可提高磷利用率61．9％。有机结合态磷肥在施用量减半时，即可达到无机磷肥高水平的效果，是一种优势突出、前景光明的新型肥料。

By pot tests on corn, the bioavailabilities of new-type organic combined state phosphatic fertilizers OP1 （ starch-based phosphatic fertilizer ） and OP3 （ straw-based phosphatic fertilizer） are compared.Experimental results show that the effect of new-type organic combined state phosphatic fertilizers on improving corn growth, increase phosphorus content and phosphorus uptake of crops, and increase of fertilizer utilization efficiency is significantly superior to inorganic phosphatic fertilizers.Compared with monocalcium phosphate, the new-type organic combined state phosphatic fertilizer can increase corn phosphorus content by 16.8%~40.0%, and corn phosphorus uptake is doubled, and increase fertilizer utilization ratio by 1.60~2.70 times; compared with sodium pyrophosphate, the new-type organic combined state phosphatic fertilizer can increase corn phosphorus uptake by 41 .9%and corn phosphorus content by 29 .6 %, and increase fertilizer utilization ratio by 61 .9%.Applying half the amount of new-type organic combined state phosphatic fertilizer, it can achieve a desirable effect, it is a new type fertilizer with outstanding advantage and a bright future.