【摘要】 <正> 应用³²P标记过磷酸钙间接标记磷矿粉的方法,在盆栽条件下,用酸性土壤种植油菜,研究中国贵州磷矿粉对油菜的有效性。结果表明,使用磷矿粉可以使油菜获得显著的增产效果。并且用A值法测出磷矿粉中磷的有效性相当于过磷酸钙中磷的有效性的17.1％,并推算出1kg过磷酸钙的肥效相当于8.53kg贵州磷矿粉的肥效。同时,田间小区试验结果表更多还原

【Abstract】 The availability of phosphorus from the ground phosphate rock, which is provided by Kaiyang mining plant, Guizhou Province of China, is investigated in pot experiment with acid red soil for rape (Brassica napus L. No. 13 Xiangvou, Chinese Olive Group) by 32P indirect labelling method. The results show that the yield increased significantly by applying ground phosphate rock (GPR) and the efficiency of GPR is equal to 17. 1 % of that from calcium superphosphate. It is calculated as that the fertilizer efficiency of 1 kg of calcium superphosphate is the same as that of 8.53 kg ground phosphate rock in Guizhou Province of China. The effect on the grain yield is evaluated by pot and field microplot experiments, and it is found that the main effect is to increase the pod number. The fertilizer efficiency in field experiment is the same as that in pot experiment.更多还原