摘要
本文研究了水热条件对四川3种紫色水稻土磷固定的影响.结果表明,紫色水稻土磷固定量为紫黄泥田>大眼泥田>红沙泥田;浸渍水分状况(含水量50％)>淹水水分状况(含水量100％)>旱作水分状况(含水量20％);高温(25℃)>低温(9～18℃)。土壤磷固定量和有效磷含量呈显著或极显著正相关。
An investigation conducted in three purple paddy soils showed that the capacity of P fixation appeared in the order of purple yellow paddy soil>red brown purple paddy soil>red sandy paddy soil; infiltration moisture regime (soil moisture content being 50%)>water logging moisture regime (100%)>upland culture moisture regime (20%); and high tempcratur (25℃)>low temperature (9～18℃). The relationship between P fixation capacity and available P content in purple paddy soils was highly significant and fitted well with Freundlich equation (X=ac^b) and Tcmpkin equation (X = K_1ln(K_2c)).
出处
《西南农业大学学报（自然科学版）》
CSCD
1991年第5期507-510,共4页
Journal of Southwest Agricultural University
基金
国家自然科学基金
关键词
土壤水
土壤温度
紫色土
水稻土/磷固定
soil water
soil temperature
purple soil
paddy soil/phosphorus fixation
