草业学报2026，Vol.35Issue(5)：126-138,13.DOI:10.11686/cyxb2025217
不同行距和播量对盐碱地湖南稷子饲草及种子产量和质量的影响
Effects of varied row spacings and sowing rates on forage and seed yield and quality of Echinochloa frumentacea in saline-alkali land
摘要
Abstract
A scientifically based and rational planting density is a key measure to improve the production efficiency of Poaceae forage.The aim of this study,therefore,was to determine the optimal row spacing and seeding rate for Echinochloa frumentacea in saline-alkali land in Yinbei,Ningxia,and to determine the impacts of these factors on yield and quality.We conducted a field experiment with a split-plot experimental design with five row spacings(20,30,40,50,and 60 cm;designated as H1-H5)and three sowing rates(7.50,11.25,and 15.00 kg·ha-1;designated as D1-D3).The results show that row spacing exerted a highly significant influence on the fresh yield of E.frumentacea(P<0.01),with the highest yield of 36129.17 kg·ha-1 in the H1D2 treatment(row spacing 20 cm,sowing rate 11.25 kg·ha-1);and the highest seed yield of 1631.95 kg·ha-1 in the H5D1 treatment(row spacing 60 cm,sowing rate 7.50 kg·ha-1).In terms of seed quality,the best results(highest germination potential,germination index,and vigor index)were in the H3D1 treatment(row spacing 40 cm,sowing rate 7.50 kg·ha-1).Row spacing had an extremely significant effect on the spikelet number,spike weight,spike length,and germination potential of seeds(P<0.01),whereas the sowing rate had an extremely significant effect on actual seed yield,germination rate,and germination potential(P<0.01).The row spacing×sowing rate interaction was highly significant for both seed production and quality parameters(P<0.01).Correlation analysis showed that row spacing was extremely significantly positively correlated with spike weight and total spike number(P<0.01),and extremely significantly negatively correlated with fresh forage yield(P<0.01).A Path analysis indicated that the total spike number made the largest direct contribution to seed yield.In a principal component analysis,the H5D1 treatment had the highest score.Therefore,to achieve high yields of forage and seeds of E.frumentacea in saline-alkali land,it is recommended to use narrow row spacing(20 cm)and a medium sowing rate(11.25 kg·ha-1)for forage production,and wide row spacing(60 cm)and a low sowing rate(7.50 kg·ha-1)for seed production.These findings provide scientific evidence for the precise management of forage cultivation in saline-alkali land.关键词
湖南稷子/行距/播量/种子产量/种子质量/通径分析Key words
Echinochloa frumentacea/row spacing/sowing rate/seed yield/seed quality/Path analysis引用本文复制引用
项凌飞,张峰举,李跃,王学琴,刘金龙,马巧利..不同行距和播量对盐碱地湖南稷子饲草及种子产量和质量的影响[J].草业学报,2026,35(5):126-138,13.基金项目
国家重点研发计划(2021YFD1900603),宁夏回族自治区重点研发计划(2023BCF01012,2022BDE92070)和宁夏回族自治区自然基金项目(2023AAC03729)资助. （2021YFD1900603）
