摘要
为给在近年冬前积温增加的情况下冬小麦的种植选择适宜的播种期和密度组合，以河农822为材料，于2006～2007年度在河北省藁城市进行了播种期（10月7日、13日和19日）和密度（基本苗180万、300万、420万和540万／ha）二因素裂区试验，研究了不同播种期和密度条件下小麦的产量及其构成状况。结果表明，播种期只对生育前期总茎数的影响显著，而密度对各生育时期总茎数的影响都显著。播种期对3个产量构成因素（穗数、穗粒数、千粒重）的影响均不显著，但对籽粒产量的影响显著。密度对产量及3个产量构成因素的影响均达到显著水平。播种期与密度对单位面积穗数、穗粒数和籽粒产量存在显著交互作用。3个播种期中，10月7日播期的平均产量显著高于10月19日的，但与10月13日播期的差异不显著。不同密度之间，300万、420万和540万／ha3个水平相互间的平均产量无显著差异，但均极显著高于180万／ha的产量。根据各播种期与密度组合的产量分析，10月7日为最佳播种期，其适宜密度为基本苗300万／ha；10月7日至13日为较适宜播种期范围，其相应的适宜密度为300万～420万／ha基本苗。
In order to clarify the suitable combination of sowing date and planting density under the condition of increaing accumulative temperature before over-winter of winter wheat, a field experiment with split plot design was conducted at Gaocheng County, the middle area of Hebei Province, during 2006-2007. The main plots were three sowing dates of October 7, 13 and 19, and the split plots were four planting densities of 180, 300, 420 and 540 seedlings per m^2. The main results were that, the effect of sowing date on total culms （main stems ＋ tillers） was statistically significant only during early growing stages, but the effect of planting density on total culms was significant during all the growing stages. The effect of sowing date on all the three yield components of wheat was not significant, but the effect on grain yield was significant because of the accumulative effect of planting density on yield components. The effect of planting density on yield and yield components were all significant statistically. Also, the interactions of sowing date and planting density on spike number per m^2, grains per spike and grain yield were significant. The comparison among the average yield of four densities for the same sowing date showed that, the average yield of wheat sown at October 7 was significantly higher than that sown at October 19, but not significant to that sown at October 13. The difference among the grain yields of the three planting densities, 300, 420 and 540 seedlings per m^2 ,wheat.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2008年第3期490-495,501,共7页
Journal of Triticeae Crops
基金
"十一五"国家"粮食丰产科技工程"河北省课题(2006BAD02A08)
河北农业大学9816科技计划项目
关键词
冬小麦
播种期
密度
产量构成因素
产量
Winter wheat
Sowing date
Planting density
Grain yield
Yield components
