【摘要】 冬春季灌溉可促进白三叶的营养生长和生殖生长,并在盛花期保有较高的土壤含水量,满足白三叶开花授粉对水分的需求,提高种子产量。在各试验处理中,盛花期冬春灌处理白三叶盖度90.50%,冠层高度13.50cm,地上干物质产量1269.09g/m2,地下干物质产量507.64g/m2,单位面积枝条数3012枝/m2,枝条花序数3.29个/枝,花序小花数96.25个/花序,种子产量578.10kg/hm2,高于其他处理,但与春灌处理差异不显著,与冬灌及对照处理间除单位面积枝条数及每枝条花序数差异不显著,其余各项均极显著(P<0.01)。更多还原

【Abstract】 The field was irrigated in winter and spring,the vegetative and reproductive growth of white clover was promoted effectively after irrigating.Moreover,soil water content was higher and ample moisture was supplied in peak flowering stage to increase seed yield.In the treatment of winter and spring irrigation,white clover coverage was 90.50%,canopy height was 13.50cm,aboveground biomass(dry) was 1269.09g/m2,underground biomass(dry) was 507.64g/m2,number of branch per unit area was 3012 branch/m2,number of inflorescence per branch was 3.29,number of floret per inflorescence was 96.25,seed yield was 578.10kg/hm2.Excepting number of branch per unit area and number of inflorescence,there was a significant difference in above items in comparison with winter irrigation and control(P < 0.01),but it was no significant difference compared with spring irrigation treatment.更多还原