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在湖北孝感市黄棕壤和咸宁市棕红壤上,进行了直接施用美国北卡林纳、摩洛哥和我国贵州磷矿粉的田间小区试验,供试作物为油菜,每种磷肥均有三种施用量。试验表明:①供试土壤严重缺磷,施磷处理与对照相比,当季油菜增产5～50倍,第二季油菜增产7～11倍;②施全磷量相等的磷矿粉与重过磷酸钙相比,当季油菜产量相当于后者的90％～120％,第二季油菜产量相当于后者的98％～126％,表明磷矿粉的效果与重过磷酸钙相当或略高;③从产量结果上看,施磷量为25mgP/kg土(指ASI提取剂可浸提的磷,下同)能达到最高产量,15mgP/kg土则可能更为经济。从后效看,磷矿粉优于重过磷酸钙。
Field experiments were conducted on yellow brown soil in Xiaogan City, Hubei Province and brown soil in Xianning City. Field experiments were conducted in which the North Carolina, USA, and the phosphate rock in Guizhou Province of China were directly applied. The tested crops were rapeseed. There were three application rates for each phosphate fertilizer . The results showed that: (1) Compared with the control, the rapeseed yield increased 5 ~ 50 times and the rapeseed yield increased by 7 ~ 11 times in the second season compared with the control; Compared with Ca, the yield of rape in the season is equivalent to 90% ~ 120% of the latter and the yield of rapeseed in the second season is equivalent to 98% ~ 126% of the latter, indicating that the effect of phosphate rock is equivalent to or slightly higher than that of superphosphate. ; ③ From the yield point of view, the highest phosphorus yield of 25mgP / kg soil (referring to ASI extractable phosphorus, the same below) to achieve the highest yield, 15mgP / kg soil may be more economical. From the aftermath, phosphate rock powder is better than heavy calcium superphosphate.