中国草食动物科学2018，Vol.38Issue(2)：31-36,6.DOI:10.3969/j.issn.2095-3887.2018.02.009
种植密度对夏季复播光敏型高丹草的影响研究
Effect of Planting Density on the Photoperiod-sensitive Sorghum-sudangrass Hybrids in Multiple Seeding in Summer
摘要
Abstract
In order to investigate the effect of planting density on the photoperiod-sensitive sorghum-sudangrass hybrids after a winter crop in Longdong dryland area,Gansu province,a field experiment of Monster,BJM and Big kahuna by three planting densities (67 500 plants/hm2,97 500 plants/hm2,127 500 plants/hm2) were conducted.The phenophase,agronomic traits and grass production were observed and compared.The results showed that the growth period was shorter in summer than that in spring.In the one-cut treatment,the plant height,stem diameter,number of blades,single plant fresh weight and number of fillers showed highly significant difference among variety(P＜0.01).Number of tillers showed significant difference among planting density(P＜0.05).And plant height showed highly significant difference among planting densities(P＜0.01).For each variety,the yield of grass was higher in the one-cut than in twice-cut treatment.The average yield across the three varieties was 3.30 times higher in the one-cut than that in the two-cuts treatment.The yield of grass in the second cut among the three varieties in the two-cuts treatment and one-cut treatment was influenced by different varieties.The yield of grass in every cut was influenced by planting density.In the one-cut treatment,the average dry matter yield of all three varieties in 127 500 plants/hm2 was 17.43％ higher than that in the 67 500 plants/hm2,and 4.15％ higher than that in the 97 500 plants/hm2.In Longdong dryland area,the best combination of cultivation practices for photoperiod-sensitive sorghum-sudangrass hybrids after a winter wheat crop was tillage with 127 500 plants/hm2,and the Big kahuna variety with one cutting event.关键词
种植密度/夏季复播/光敏型高丹草/农艺性状/产草量Key words
planting density/multiple seeding in summer/photoperiod-sensitive sorghum-sudangrass hybrid/agronomic traits/yield of grass分类
农业科技引用本文复制引用
边琳鹤,王斐,贺春贵,何振富..种植密度对夏季复播光敏型高丹草的影响研究[J].中国草食动物科学,2018,38(2):31-36,6.基金项目
甘肃省科技厅科技支撑项目(144NKCA055) （144NKCA055）
甘肃省科技厅科技重大专项(2015GS05915) （2015GS05915）
