摘要
明确冀南麦区适期播种(10月12日)条件下不同小麦品种的最佳种植密度,可为指导当地小麦高产栽培提供技术依据。采用二因素(品种、密度)三水平试验设计,以当地主推小麦品种济麦22、邯6172和衡4444为试验材料,基本苗密度均设300万、375万和450万株/hm^2计3个水平,研究了不同种植密度对小麦产量、产量构成因素、干物重、有效分蘖成穗率、收获指数等主要性状的影响。结果表明:参试小麦品种产量受种植密度影响较大,其中,济麦22在种植密度为375万株/hm^2时产量最高,邯6172和衡4444均在种植密度为300万株/hm^2时产量最高;并分析了各品种最佳种植密度下形成高产的主要原因。另外,适宜的种植密度可使小麦在生长中后期形成较多的干物重、次生根条数和单株分蘖,且有效分蘖成穗率高,主茎穗长较长,有效小穗数多、无效小穗数少,容重和收获指数高。
For clear the optimum planting density of different wheat varieties under the conditions of suitable sowing date（October 12） in southern of Hebei region, and provide technical basis for high yield cultivation of local wheat. With the local main wheat varieties Jimai22, Han6172 and Heng4444 as the test materials,the effects of basic seedling density of 3.00 million,3.75 million and 4.50 million plants/hm-2 on wheat production, production constitute factors, dry matter changes, effective tiller into spike rate,harvest index and so on were studied with the test design of two factors（variety, density） and three level.The results showed that the production of varieties was greatly influenced by planting density,the yield of Jimai22 was the highest under the planting density of 3.75 million plants/hm-2, and Han6172 and Heng4444 gained the maximum yield under the planting density of 3.00 million plants/hm-2,then the main reasons for the formation of high yield under the optimum planting density were analyzed. In addition,under the optimum planting density,more dry matter weight and root and tiller number were formed,the effective tiller earing rate was higher,main stem length was longer,with more effective spikelet and less invalid spikelet,and higher bulk density and harvest index.
出处
《河北农业科学》
2016年第2期13-18,共6页
Journal of Hebei Agricultural Sciences
基金
国家小麦产业技术体系建设项目(CARS-03-2-4)
关键词
冬小麦
冀南麦区
种植密度
产量
成穗率
Winter wheat
Southern of Hebei region
Planting density
Yield
The spike rate
