【作者】 王庆仁； 李继云； 李振声；

【Author】 Wang Qingren Li Jiyun (Research Center for Eco-Environmental Sci. Academia Sinica, Beijing 100085)Li Zhensheng (institute of Genetic Research, Academia Sinica, Beijing 100101)

【机构】 中国科学院生态环境研究中心； 中国科学院遗传研究所；

【摘要】 温室盆栽试验条件下,在磷高效小麦基因型对不同磷肥肥效研究的基础上,进一步探讨了石灰性土壤上不同磷肥后效对磷效率小麦基因型生长发育及产量的影响。结果表明,磷高效小麦基因型对不同磷肥后效的反应同样高于磷低效小麦基因型。从磷肥类型上比较,枸溶性磷肥的后效往往高于水溶性磷肥。磷酸二铵、普钙和沉淀磷肥的当季利用率为5％～13％,加上下茬的后效,累计利用率分别为15.22％、14.72％和14.30％。然而对于两季皆不施磷肥的对照处理,对小麦生长发育及产量的影响后茬明显高于前茬,说明在温室栽培条件下,作物栽培过程中对土壤具有明显的熟化作用,从而促进了土壤中某些难溶态磷的分解释放,为作物生长提供了有效磷源。更多还原

【Abstract】 Based on the effect of phosphate fertilizers on wheat genotypes for high phosphorus efficiency, a further study for phosphate residual effects on wheat genotypes with phosphorus efficiencies after the first year supplied to calcarious soil and growing similar genotypes was carried out in glasshouse conditions with pot experiment.The results indicated that phosphate residual effect on highly efficient genotypes was still higher than that on low efficient ones. Among various phosphate fertilizers used, citric acid soluble one-deposit phosphate (CHP) showed the highest residual effect while for water soluble phosphate, single super phosphate (SSP) had a greater residual effect than diammonium phosphate (DAP) did.The total utilization rates for DAP, SSP and CUP were 60.87% , 58.78%and 57.20%respectively although the utilization rates for the three kinds of fertilizers at the first season were only approximately 5% - 13% .However, for the control treatment (CK) without phosphate fertilizer supplied, the yield of seeds or biomass in the second season was higher than that in the first which indicates that, under glasshouse conditions, crop culturing could improve some unavailible phosphate to be leased for plant requires.更多还原