土壤磷、肥料磷和VA菌根真菌对植物磷营养的贡献  

CONTRIBUTION OF SOIL 32 P, FERTILIZER 32 P AND VA MYCORRHIZAL FUNGI TO PHOSPHORUS NUTRITION OF CORN PLANT

作　　者：冯固[1] 杨茂秋[1] 白灯莎[1] 黄全生[1] 

机构地区：[1]新疆农业科学院核技术生物技术研究所

出　　处：《核农学报》1997年第4期237-242,共6页Journal of Nuclear Agricultural Sciences

基　　金：国家自然科学基金;新疆自然科学基金

摘　　要：采用３２Ｐ示踪法研究了在有和无ＶＡ菌根真菌存在条件下，肥料磷、土壤磷以及人工合成磷酸盐（磷酸二钙、磷酸八钙、磷酸铁、磷酸铝和磷灰石）对玉米植株生长及磷素营养的相对贡献。结果表明：ＶＡ菌根真菌和磷酸二钙、磷酸八钙、磷酸铁和磷酸铝均促进了玉米植株生长，增加了植株含磷率和吸磷总量。这４种磷酸盐对玉米植株生长的贡献大于ＶＡ菌根真菌。肥料磷、土壤磷以及５种磷酸盐对玉米植株磷素营养的贡献大小为：磷酸盐（磷灰石除外）＞土壤磷＞肥料磷。接种ＶＡ菌根真菌提高了土壤磷的贡献率，降低了磷酸盐的贡献率，而对肥料磷的贡献率影响不大。P labelled fertilizer and five synthetic phosphates (dicalcium phosphate, octocalcium phosphate, iron phosphate, aluminium phosphate and apatite), which were used to simulate inorganic phosphates such as Ca 2 P,Ca 8 P, Fe P, Al P and Ca 10 P in calcareous soil, were applied to corn plants inoculating with and without vesicular arbuscular (VA) mycorrhizal fungi in a calcareous soil. The results showed that VA mycorrhizal fungi and dicalcium phosphate, octocalcium phosphate, iron phosphate, aluminium phosphate promoted growth and increased phosphorus content of corn plant. The four synthetic phosphates except apatite had higher contributions to corn plant growth than VA mycorrhizal fungi. Contributions of fertilizer P, soil P and synthetic phosphates to phosphorus nutrition of corn plant were in order of synthetic phosphates (except apatite) >soil P>fertilizer P. Inoculating with VA mycorrhizal fungi increased the contribution of soil P and decreased the contribution of synthetic phosphates, but did not affect the contribution of fertilizer P. \ \

关 键 词：土壤磷 肥料磷 植物磷营养 VA菌根真菌 

分 类 号：S154.381[农业科学—土壤学] S153.61[农业科学—农业基础科学]