摘要
本文用改进的石灰性土壤无机磷分级方法系统地研究了河北省主要类型土壤的磷素形态，小麦玉米轮作中水溶性磷肥施入土壤后的动态转化。研究结果表明，潮褐土、褐土、潮土的磷素形态为：无机磷占土壤全磷的７３２％～９６４％，ＣａＰ占无机磷的７９１％～９０８％，Ｃａ１０－Ｐ占ＣａＰ的５１７％～９７４％。小麦玉米轮作中水溶性磷肥施入土壤后的化学行为：第一年，小麦和玉米共吸收利用了施入磷的２４６％～２７４％，作物主要消耗了土壤积累态Ｃａ２－Ｐ，其次为Ｃａ８Ｐ；第二、三年，作物分别吸收利用了施入磷的１９０％～２０４％、１２４％～１７３％，主要消耗了土壤积累态Ｃａ８Ｐ，其次为Ｃａ２Ｐ、ＡｌＰ，再次为ＦｅＰ。土壤积累磷以Ｃａ８Ｐ为主，其次为Ｃａ２Ｐ，再次为ＡｌＰ、ＦｅＰ。土壤各形态无机磷的转化主要发生在Ｃａ２Ｐ与Ｃａ８Ｐ之间。化学磷肥与有机肥配施提高了土壤积累态磷的有效性。施用磷肥的效应在连续３年小麦玉米轮作中均表现明显的增产效应。
The study on the transformation of applied phosphorus and availability of residual phosphorus in wheat maize rotation was conducted on calcareous soils for three years The results showed that inorganic P accounted for 73 2%～96 4% of total soil P, Ca P was 79 1%～90 8% of inorganic P, Ca 10 P, Ca 8 P, Ca 2 P was 51 7～97 4%, 1 7%～44 8%, 0 9%～3 6% of Ca P, respectively and 24 6%～27 4%, 19 0%～20 4%, 12 4%～17 3% applied P was taken up by wheat and maize at each rotation, respectively The main fractions of residual phosphorus was Ca 2 P, Ca 8 P Most of absorbed P by crops was Ca 2 P, Ca 8 P, Al P, Fe P, that was important P resource at successive cultivating P fertilizer used together with manure increased the availability of residual P compared with P fertilizer applied alone Adding P fertilizer during three years successively cultivating increased the yield of wheat and maize
出处
《植物营养与肥料学报》
CAS
CSCD
1999年第1期14-20,共7页
Journal of Plant Nutrition and Fertilizers
基金
国家自然科学基金
河北省自然科学基金
关键词
土壤
磷肥转化
小麦-玉米
轮作
积累态磷有效性
Calcareous soils Transformation of phosphorus Rotation Residual phosphorus
