摘要
对5个温带草种和1个亚热带草种的三种混播组合连续3年的试验表明:草种生态类群组合相同的混播草地,刈割次数与牧草收获量在各生产年度中均呈极显著相关,与草地持续生产力呈极显著负相关。草种生态类群组合不同的混播草地,在第一生产年度中,刈割次数与牧草收获量呈极显著相关,在第二生产年度中呈显著负相关,与草地持续生产力呈极显著负相关。根据草地生产力的盈亏情况,确认扁穗牛鞭草+多年生黑麦草+多花黑麦草+白三叶和扁穗牛鞭草+多年生黑麦草+多花黑麦草+红三叶组合的适宜刈割次数为年四次,白三叶+红三叶+鸭茅+多花黑麦草组合的适宜刈割次数为年二次。
The experiment of mixture sowing with three combinations of 5 extratropical and 1 semitro-pical speices of pasture plant in a succession of three years revealcd:On the grassland sown with some speices of pasture plant belongs to the same ecological group,the cutting freqencies were highly significantly correlated with the yields of pasture plant in the three years, but were negatively correlated with the persistency of the grassland at a highly significant level.On the grassland sown with the species of pasture plant belongs to the different ecological groups, the cutting frequency was highly significantly correlated with the yield of pasture plant in the first year, but was negatively correlated with the yield in the second year and with the persistency of the grassland at the significant or highly significant respectivey.According to the profit and loss vaelue of the productivity of the grassland, it could be determined that, the favourable cutting frequency in a fyear was 4 times for the combinations 'Hemrthrica compressa+Lolium perenne +Lolium multi-lorum+ Trifolium ' or 'H.compressa + L.perenne + L.multiflorum + T. protense' , 2 times for the combination 'T.repens + T.protensc + Dactylis glomerata + L.multiflorum' .
出处
《西南农业学报》
CSCD
1989年第3期82-87,共6页
Southwest China Journal of Agricultural Sciences
基金
"四川农区酸性黄壤地区建立人工草地综合技术研究"课题的专题之一
关键词
牧草
刈草次数
收获量
草地
生产力
Pasture plant, Cutting frequency, Pasture yield , Grassland persistency , Ecolo- gical group, Combination.
