有机肥料和土壤中的有机磷对水稻的营养效果

本文对三种有机肥料和二种土壤的肌醇六磷酸磷含量和有机磷进行了测定和分组,通过无菌溶液培养,比较了肌醇六磷酸磷与无机磷在等磷量的条件下对水稻的营养效果.结果表明:猪、鸡粪中有机磷的形态主要是以肌醇六磷酸钙镁盐为主,而土壤和牛粪是以肌醇六磷酸铁的形式为主.肌醇六磷酸磷对水稻的营养效果明显优于无机磷.磷的分组结果表明:猪、鸡粪中有机磷以活性和中等活性有机磷为主,而土壤则以稳定性有机磷为主,牛粪介于二者之间.因此,猪、鸡粪中有机磷的有效性高于牛粪,而以土壤中的有机磷为最低.

EFFECTS OF ORGANIC PHOSPHORUS IN ORGANIC MANURES AND PADDY SOILS ON RICE GROWTH

The paper deals with the inositol hexaphosphate contents and fractionation of organic P from three kinds of organic mannres and two kinds of paddy soils.The nutritional effecr of inositol hexaphosphate on the growth of rice seedlings was compared with that of inorganic phosphorus at the same P level.Inositol hexaphosphate was the main form of organic P in the organic manures and paddy soils.In pig and chicken feces,Ca-or Mg-inosirol hexaphosphate was up to 80% of the total organic phosphorus.However,in the paddy soils and cattle feces,Fe-inositol hexaphosphate was predominant in the total inositol phosphale.Fractionation of organic P indicac manures that the availability of organic P in organic manures was higher than in soils.In aseptic culture,inositol hexaphosphate had a better effect on rice seedling growth than inorganic phosphorus.