Effects of Single-seed Sowing on Root Growth, Root-shoot Ratio, and Yield in Peanut (Arachis hypogaca L.)
Peanut cultivar Huayu 22 was used to study the differences between single-seed sowing and double-seed sowing modes on root growth,root and shoot relationship,and yield under corresponding planting density.The two single-seed sowing treatments were 195 000 holes per hectare (S 1) and 225 000 holes per hectare (S2),respectively with the double-seed sowing (150 000holes per hectare) as control.During the growth period,dry weights,length,volume and absorption area of the root under three treatments increased and reached the maximum at 40-50 days after flowering,and then decreased.The average root diameter decreased and reached the minimum at 50-60 days after flowering,and then increased.The dry weight of aboveground part and pod increased while the root-shoot ratio decreased continuously.S1 and S2 treatments could improve dry weight of the seedlings,the length,the volume,the absorption area of the roots and the root-shoot ratio,and reduce average root diameter during the whole growth period,especially at the late growth period.Additionally,S1 treatment saved 35％ sowing seeds and improved peanut yield by 7.98％-8.38％.These results indicated that single-seed sowing could improve peanut yield through guaranteeing relatively stronger root growth predominance,regulating root-shoot ratio,and increasing the productivity potential for each seedling.
国家科技期刊平台
NSTL
万方数据
维普
