不同水稻品种施钾增产效果及施用方法研究  

A study on the effect of potassium fertilizer and application methods on yield promotion of different rice varieties

作　　者：杨贵成 杨贵春 王加龙[3] 王恒光 顾金勇 顾立松 孙晓霞 吉奎良 

机构地区：[1]东海县石湖乡农业技术推广服务站,江苏东海222302 [2]东海县双店镇农业技术推广服务站,江苏东海222331 [3]江苏省东海中等专业学校,江苏东海222300 [4]连云港市天收种业有限公司,江苏新浦222344 [5]东海县白塔埠镇农业技术推广服务站,江苏东海222345

出　　处：《农业科学研究》2011年第2期42-46,共5页Journal of Agricultural Sciences

摘　　要：以当前生产上推广应用的高产水稻品种中籼糯、徐稻3号、盐稻8号、淮稻6号、连粳7号为材料,研究钾肥施量、种类、施肥方法、施肥期对水稻产量及其构成因素、茎蘖动态、灌浆速率的影响.结果表明:①不同钾肥施肥量对水稻品种的增产效果差异较大,盐稻8号、淮稻6号施钾肥增产幅度最大.②钾肥适宜施量受土壤钾含量影响较大,低钾水平下,产量随施钾量增加而增加.施KCl 0～16 kg/666.7 m2,每增施1 kg/666.7 m2KCl,平均增收稻谷6.7 kg/666.7 m2.施钾量为13.5 kg/666.7 m2左右时,产量达极值,为563.3 kg/666.7 m2,之后产量开始下降.平均每kg KCl增收稻谷6.26 kg,最高可达8.45 kg.③喷施钾肥使籽粒灌浆期缩短,灌浆势提高.④不同种类钾肥比对照增产幅度为5.1%～18.7%,以秸秆和钾肥增产效果最好.In this study we used the commonly promoted high yield rice varieties Xiabru（indica）,Xudao 3,Yandao 8,Huaidao 6,Lianjing 7（Japonica） as experimental materials to study the interaction of different rice varieties with different levels of potassium level in potassium fertilizer,but also the effect of potassium fertilizer on rice production,yield components,grain filling properties and tiller dynamics under different fertilizing amount,species,fertilization methods and fertilization timing.The results demonstrated as following：1.Different potassium fertilization amount has different yield promotion effect on different rice varieties with higher potassium critical value in mid-season late-maturing varieties than the early-season varieties,and Japonica rice varieties than indica variety.2.Different potassium fertilization amount shows that increase of the fertilizer amount results in increased yield,spike per unit area grain number per spike and decreased grain weight.3.The results of potassium spraying experiment showed that grain weight under potassium spraying treatment is less than CK,the Logistic equation is used for simulating filling process to generate the filling equation which shows the shortening of grain filling period and increase of grain filling potential.4.Various types of potassium fertilizers show that each of its treatment results in higher yield than CK with output increased by 5.1%～18.7%,by looking into the ears,compared with the CK,the effect is not obvious to see from each panicle;however any treatment on grains per panicle were higher than CK,the grains and grain weight were also higher than CK.

关 键 词：钾肥 水稻品种 产量构成 灌浆特性 

分 类 号：S511[农业科学—作物学]