长期施肥对土壤无机磷形态组成的影响  被引量:25

Effect of Long Term Fertilization on Inorganic-P Form Composition in Soil

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作  者:吕家珑[1] 刘文革[1] 王旭东[1] 李祖荫[1] 

机构地区:[1]西北农业大学农化系,中国农科院郑州果树研究所

出  处:《西北农业大学学报》1995年第3期51-54,共4页Journal of Northwest Sci-Tech University of Agriculture and Forestry(Natural Science Edition)

基  金:旱地土壤培肥研究课题

摘  要:采用顾益初、蒋柏藩提出的石灰性土壤无机磷分级方法,研究了施肥对土壤无机磷形态组成的影响。结果表明:①施用含磷肥料(化肥或有机肥),均可显著地增加Ca_2-P、Ca_8-P、A1-P和Fe-P的含量,其中钙磷增量约为铁铝磷的2倍;②Ca_(10)-P和O-P在短时间里是不能生成的。旱地长期施用化学磷肥,可明显地提高O-P和Ca_(10)-P的含量;③长期施用含磷肥料,除被作物吸收利用外,残留在土壤中的无机磷,约有60%以上是以有效磷源存在的。This paper studies the influence of fertilization on morphological compo-sition of soil inorganic-Pin terms of a scheme developed by Gu Yichu and Jiang Baifanfor fractioiializing inorganic-P in calcareous soil. The results showed that :1 ) Usingphosphate fertilizers, chemical or organic, the contents of Ca_2-P,Ca_8-P,Al-P and Fe-Pcould be increased significantl The increment of Ca-P was twice as much as those ofFe-P and Al-P.2)Ca_(10)-P and O-P could not be formed in a short time,but their contentscould be raised obviously by using chemical fertilizer for a long term in arid soil.3) Witha long term P fertilizerapplication,there was still about 60%of the residual P availablein soil after crop absorption

关 键 词:石灰性土壤 定位试验 模拟试验 无机磷 形成 

分 类 号:S143.2[农业科学—肥料学] S147.2[农业科学—农业基础科学]

 

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