草业科学2012，Vol.29Issue(11)：1743-1748,6.
沿淮地区季节性栽培紫花苜蓿的适宜播种期
A study on optimized sowing date of seasonal cultivation alfalfa along Huai River region
摘要
Abstract
In order to explore the optimum sowing date of alfalfa (Madicago sativa) in seasonal planting system in Huai River region, effects of autumnal sowing date on growth characteristics and forage yield were investigated in field experiments at Funan and Huaian from September 2009 to June 2011. The results showed that in the seasonal planting system (autumn sowing and twice-cutting in next spring), growth characters and forage yield reduced gradually with the autumn sowing date delayed. The average plant height at the early bloom stage in the first cutting was 91.91 cm for the sowing date of September 6, which was near double that of October 22 (42.90 cm) on the Huaian experiment site. Accordingly, the forage yield on the sowing date of September 6 was the highest, 4.37 kg ·m-2 in fresh weight and 1.05 kg·m-2 in dry matter. Forage yield was positively correlated (P〈0.01) to plant height, shoot number and dry weight per plant (P〈0.01). According to the path analysis results, plant height and dry weight per plant were the most primal factors for alfalfa forage yield. The results implied that the early-sowing in autumn improved the dry matter yield of alfalfa by increasing the plant height and dry weight per plant. The optimum sowing date of alfalfa for seasonal cultivation along Huai River region should be in Septem ber to early October.关键词
紫花苜蓿/播种时间/牧草产量/产量影响因子/冬闲田Key words
alfalfa/sowing date/forage yield/yield influencing factor/winter-fallow farmland分类
农业科技引用本文复制引用
梅小燕,沈益新..沿淮地区季节性栽培紫花苜蓿的适宜播种期[J].草业科学,2012,29(11):1743-1748,6.基金项目
国家科技支撑计划项目 （）
江苏省农业三项工程项目SX（2010）135 （）
