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在长期定位试验条件下,研究了稻作制,有机肥用量及地下水位对红壤性水稻土有机磷组分的影响。结果表明,不同稻作制间,土壤有机磷总量以稻-稻-冬绿最高,稻-稻-冬油次之,稻-稻-冬泡最低;不同施肥水平之间,高量有机肥处理的有机磷高于常量有机肥和化肥处理;高地下水位有利于土壤有机磷的累积。土壤有机磷各形态中,活性有机磷和中活性有机磷随着年际的变化逐渐增加,并且冬泡处理的活性有机磷,中活性有机磷和中稳性有机磷在三种稻作制中最低,施用高量有机肥有利于活性有机磷和中稳性有机磷的累积。
Under long-term experimental conditions, the effects of rice cropping system, organic manure and groundwater level on organic phosphorus fractions in paddy soils were studied. The results showed that the total content of soil organic phosphorus was the highest in paddy-rice-winter-greening, the lowest in rice-paddy-winter oil and the lowest in paddy-rice-winterblad in different rice-growing systems. Treatment of organic phosphorus than the constant organic fertilizer and fertilizer treatment; high groundwater level is conducive to the accumulation of soil organic phosphorus. In the forms of soil organic phosphorus, the content of active organic phosphorus and active organic phosphorus increased with the interannual change, and the active organic phosphorus, active organic phosphorus The lowest, the application of high amounts of organic fertilizer is conducive to the accumulation of active organic phosphorus and stable organic phosphorus.