摘要
为探究发草(Deschampsia cespitosa)适宜播种量、施肥量和行距,本研究采用3因素5水平的试验设计,研究不同播种量、磷酸二铵施用量及行距对发草种子产量及产量构成因素的影响,为发草的实际种子生产和高效原种扩繁提供技术支持与理论依据。研究结果显示,不同播种量、施肥量及行距处理下,第2年种子产量以播种量22.5kg·hm^(-2),磷酸二铵施用量150.0 kg·hm^(-2),行距30.0 cm的组合模式最高,产量为130.78 kg·hm^(-2)。从各产量构成因素与种子产量相关性来看,种子产量与穗宽、每生殖枝小穗数、每生殖枝小花数和每生殖枝结实数存在极显著正相关(P <0.01),与穗长存在显著正相关(P <0.05)。通过多元回归及通径分析关系模型发现,穗宽、每生殖枝结实数、小花数、小穗数及千粒重对种子产量增益明显。在种植过程中可适当调整栽培技术,增加发草穗宽、每生殖枝结实数和小花数来提高发草种子产量。
This experiment adopted a three-factor and five-level experimental design to study the influence of different seeding densities,fertilizer quantities,and row spacings on the seed yield and yield components of Deschampsia cespitosa,and provide technical support and a theoretical basis for the efficient original seed propagation of D.cespitosa.We found that the combination mode of 22.5 kg·ha^(-1) sowing density,150.0 kg·ha^(-1) fertilization quantity,and 30.0 cm row spacing resulted in the highest seed yield in the second year(130.78 kg·ha^(-1)).There was a highly significant positive correlation between seed yield and spike width,spikelets per reproductive branch,florets per reproductive branch,and fruiting number per reproductive branch(P<0.01),and there was a significant positive correlation between seed yield and spike length(P<0.05).Through multiple regression and a path analysis relationship model,we found that ear width,spikelets per reproductive branch,fruit-bearing number per reproductive branch,florets per reproductive branch,and 1000-seed weight had significant effects on seed yield,and had higher direct and indirect effects on seed yield.In the future planting process,the cultivation technology can be appropriately adjusted to increase the ear width,the number of solid seeds per reproductive branch,and the number of small flowers per reproductive branch to improve the yield of D.cespitosa.
作者
何斌
张敏
王彦龙
刘颖
马玉寿
HE Bin;ZHANG Min;WANG Yanlong;LIU Ying;MA Yushou(Qinghai University of Animal Husbandry and Veterinary Sciences/Qinghai Key Laboratory of Alpine Grassland Adaptive Management/Key Laboratory of Utilization of Fine Forage Germplasm Resources in Qinghai Tibetan Plateau,Xining 810006,Qinghai,China)
出处
《草业科学》
CAS
CSCD
北大核心
2024年第2期371-381,共11页
Pratacultural Science
基金
科技部国家重点研发项目(2021YFC3201603)
青海学者项目“高寒地区乡土生态草种驯化及其应用示范研究”。
关键词
发草
播种量
施肥量
行距
栽培技术
种子产量
产量影响因素
cultivation techniques
fertilization quantity
reproductive branch
row spacing
seed yield
seeding density
yield influencing factors
