摘要
土壤缺磷是世界范围内普遍存在的问题,它严重限制了作物的产量及分布。随着人口增长对粮食需求的不断增加以及由此引起的能源危机,这种趋势还将会不断加重。因此,如何通过发掘植物自身潜力,减少土壤对磷酸盐的固定、吸附以提高植物对磷肥的利用效率及活化被土壤固定的磷,这对提高粮食产量、降低生产成本以及保护生态环境将起到重要作用。本文阐述了提高土壤中磷的生物有效性的必要性和可能性,综述了植物磷素营养特性差异的机理及遗传研究进展,旨在为培育磷肥利用效率高,活化土壤磷能力强的耐低磷作物新品种提供有关信息及理论依据。
Phosphorus deficiency, which seriously limits yields and distribution of crops,is a problem extensively existing in soils around the globe. The tendency of P -deficiency will be aggravated by both the ever increasing requirements for grains and energy crisis caused by population explosion in the world. Therefore,how to improve the efficiency of P -fertilizer and to mobilize the P absorbed and fixed in soil through developing the potentialities existing in plants will play an important role in improving grain yields,reducing production costs and protecting eco -environment. In this paper possibility of enhancing the bioefficiency of P is discussed and mechanisms and genetic studies of the differences in P nutrient characteristics of plants are also reviewed for the pourpose of providing theoretical basis for breeding new varieties which can efficiently utilize P fertilizer and tolerate P - defficiency.
出处
《生态农业研究》
CSCD
1994年第1期16-23,共8页
Chinese Journal of Eco-agriculture
关键词
磷素营养
基因型
土壤
Phosphorus defficiency
Nutrient stress
Genotype
