摘要
采用土培盆栽法进行了甜菜对外加有机磷──植醚的吸收利用特点和植醚酶对改善甜菜磷素营养及生物产量等效应的研究，结果表明：甜菜能在一定程度上吸收利用土壤外源植酸态磷，其生物产量效果为施等量无机磷的７０％以上；植酸酶的应用能显著加速有机磷的水解，增加溶液中磷的含量，促进甜菜根系生长发育，提高磷吸收速度，增加磷的吸收量，并最终体现在生物产量的增加；植酸酶的效果随配施的植酸量的增加而增加，当配施的植酸量达到６０ｍｇ／ｋｇ时，其效果达到施等量无机磷水平。
The uptaking and utilizing properties of soilexternal organic phosphorus──phytin andthe improvement of phosphorus status，the effects of biomass by the use of phytase in sugarbeet were studied．The results showed that，a） Sugar beet could in some extend use soil ex-ternal phytin，the effects of biomass by the use of phytin is more than 70％of that by inor-ganic phosphorus；b）The application of phytase，especially under the conditions of higherphytin applying rate, could accelerate the hydrolysis of phytin，increase the phosphorus con-tent in soil solution，stimulate the development of sugar beet roots ，raise the uptake rates ofphosphorus and finally showed a increase of biomass；c）As the applying rate of phytin in-creased，the effects of phytase were increased gradually， when the applying rate of phytinreached to 60mg／kg，the effects of phytin plus phytase were similar to that of inorganic phos-phorus.
出处
《中国糖料》
1997年第3期8-12,共5页
Sugar Crops of China
