施用钾肥对冬小麦‘邯6172’产量及群体质量的影响

Effects of Potassium Fertilizer on Yield and Population Qualities of Winter Wheat‘Han6172’

为给冀南地区冬小麦合理使用钾肥提供科学依据,以当地主推品种‘邯6172’为试验材料设置了田间试验,研究了不同钾肥处理对冬小麦产量及其构成因素、群体质量的影响。结果显示:施用钾肥可以显著提高小麦的籽粒产量,增产幅度为3.93%～9.82%,随着施肥量的增加,产量呈现先增后减的趋势,最佳施肥量为75～112.5kg/hm2。从产量及经济效益综合分析,认为以施钾量为75kg/hm2效果最好,与不施钾肥处理相比可增产8.83%,每公斤K2O增产7.49kg,增收838.47元/hm2。

‘Han6172’,a main wheat cultivar in Hebei,was used in this experiment in order to provide scientific basis for potassium fertilizer rational use of potash fertilizer in the southern Hebei.The potassium fertilizer was included six fertilizer levels of 0,37.5,75,112.5,150,187.5 kg/hm2.The results showed that,the potassium fertilizer could significantly increase grain yield of winter wheat,and the yield increased between 3.93%-9.82%.The grain yield of the wheat increased with the increase of potassium fertilizer rate,the best fertilization was 75-112.5 kg/hm2,but efficiency decreased when the potassium fertilizer rate was over K2O 112.5 kg/hm2.Considering of higher yield and economic benefits,the treatment with 75 kg/hm2 of K2O application was optimal with total increment of 8.83% of yield and 838.47 yuan/hm2 of profit increment and with 7.49 kg yield per kg K2O.