金华长期定位试验中杂交水稻的钾素营养特征研究  

Analysis on potassium nutrient property of hybrid rice from site-specific long term experiment in Jinhua.

作　　者：胡泓[1] 王光火[1] 

机构地区：[1]浙江大学农学系,浙江杭州310029

出　　处：《浙江大学学报（农业与生命科学版）》2003年第3期257-260,共4页Journal of Zhejiang University:Agriculture and Life Sciences

基　　金：国际肥料协会(IFA)资助项目.;磷钾研究所(PPI)资助项目.;国际钾研究所(IPI)资助项目.

摘　　要：水稻是需钾量较大的作物之一,其需钾特点在不同品种和季节间存在着明显的差异,为进一步了解杂交水稻对钾肥的吸收和利用特点,自1997年早稻开始,在浙江省金华市农业科学研究所试验田进行钾肥连续4年的定位试验,结果表明,施钾后,杂交早稻的平均增产量为744.6kg/hm2,晚稻为864.5kg/hm2,早稻的收获指数为0.60,晚稻为0.65,杂交晚稻施钾增产效果比早稻明显.杂交早稻地上部分钾的总吸收量为81.5～109kg/hm2,晚稻为88.0～125.2kg/hm2,高于常规稻.施钾后,杂交早稻对钾的吸收利用效率和常规早稻十分接近,杂交晚稻却低于常规晚稻,说明相对常规稻而言,杂交水稻并没有表现出嗜钾的特征.Rice is one of those crops that have a relatively high requirement for potassium. The demand of rice for potassium is characterized by its remarkable variations with varieties and seasons. In order to obtain information about the peculiarities of hybrid rice in potassium absorption and utilization, a sitespecific fertilization experiment was conducted in the field of Jinhua Agriculture Science Research Institute which lasted 4 years started from 1997. The results were as follows, the average grain yield increase in early and late hybrid rice that received K were 744.6 kg/hm2 and 864.5 kg/hm2, respectively, and the corresponding harvest indices were 0.60 and 0.65, respectively. Thus the late hybrid rice was about to be more responsive to the beneficial of K in increasing grain yield. The amount of K that accumulated in total dry matter aboveground were 81.5109 kg/hm2 for early hybrid rice and 88.0125.2 kg/hm2 for late hybrid rice, both of them were higher than that of the inbred rice. K use efficiency of hybrid rice is close to inbred rice at early rice, but it is lower than inbred rice at late rice, compared with inbred rice, it indicates that hybrid rice did not behave the characteristic of K luxury consumption.

关 键 词：杂交水稻 钾素营养特征 钾肥 长期定位试验 养分利用效率 

分 类 号：S511[农业科学—作物学]