播种行距和播量对发草生产性能的影响

Effect of Row Spacing and Sowing Rate on Production Performance of Deschampsia caespitosa

在田间试验条件下,设置了4个播种量(4.5 kg·hm^(-2)、7.5 kg·hm^(-2)、10.5 kg·hm^(-2)和13.5 kg·hm^(-2))和2个种植行距(15 cm和30 cm)共8个处理,通过连续2年测定发草种子产量和牧草产量,研究分析不同行距和播种量对发草生产性能的影响。结果表明,行距和播种量对发草种子产量和牧草产量均有显著的影响,在一定范围内种子产量和干草产量随播种量的增加呈现先增加后减小的趋势,且在行距30 cm、播种量10.5 kg·hm^(-2)种植条件下牧草产量相对较高,可达4124.2 kg·hm^(-2);而种子产量在行距30 cm、播种量7.5 kg·hm^(-2)配置下较优,可达465.6 kg·hm^(-2)。

In the field experiment,four seeding rates(4.5 kg·hm^(-2),7.5 kg·hm^(-2),10.5 kg·hm^(-2) and 13.5 kg·hm^(-2))and two planting row spacing(15 cm and 30 cm)were set for 8 treatments.The effects of different row spacing and seeding amount on grass production were studied by measuring seed yield and forage yield for two consecutive years.The results showed that row spacing and sowing amount had significant effects on grass seed yield and herbage yield.Within a certain range,seed yield and hay yield increased firstly and then decreased with the in-creasing of sowing amount,and the herbage yield was relatively high under the condition of row spacing of 30 cm and sowing amount of 10.5 kg·hm^(-2),reaching 4124.2 kg·hm^(-2).The seed yield was 465.6 kg·hm^(-2) under 30 cm row spacing and 7.5 kg·hm^(-2) seeding rate.