摘要
为了研究陕西关中地区小麦播期与密度对产量的影响,采用播期与密度最优试验设计,分析了不同播期与密度处理下冬小麦西农9871产量及产量构成因素的特点。结果表明,小麦产量在7 500~9 750kg.hm-2范围内,适宜的播种期是10月8日至10月20日,播种密度为181万~248万.hm-2。穗值产价、粒值产价、重值产价随着播期的推迟呈现下降的趋势,随着密度的提高而增加。早播情况下低密度分蘖成穗多,但随着播期的推迟分蘖成穗减少,需要加大播种密度,通过提高主茎成穗数来提高小麦产量。粒值产价和重值产价比较大,在成穗数得到保证的前提下,通过增加穗粒数与千粒重能够提高小麦产量。
We adopt optimum design of sowing date and density in experiment.Effects of sowing date and density on grain yield and yield components of winter Wheat XiNong9871.The result shown that the two factors significantly contributed to yield.To achieve wheat grain yield 7 500~9 750 kg·hm-2,the most suitable sowing period was from October 8 to 20,and density was from 181×104 plants·hm-2 to 248×104 plants·hm-2.The spike valuation,grain valuation and the weight valuation all decrease with sowing date postponed,and improve with the density increase.We get conclusion that low density in early sowing date can make more tillers into spikes.With sowing date postponed,we can improve wheat yield by adding the number of main stems.Additional,increasing the grains per spike and weight per 1000 grains can improve the wheat yield when the effective spike number assuing.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2011年第3期529-534,共6页
Journal of Triticeae Crops
基金
农业部公益性行业(农业)科研专项(200903007-06)
关键词
小麦
西农9871
播期
密度
产量
三值产价
Wheat
Xinong 9871
Sowing date
Planting density
Grain yield
3-valuation of yield
