Planting patterns and density of peanuts under different soil fertility levels
To make full use of natural resources,suitable planting patterns and densities for peanut under dif-ferent soil fertility levels were investigated,using HY60 as material.Total of 12 planting densities were set under 2 planting patterns of single-seed sowing(SS)and double-seed sowing(DS).Their effects on agronomic traits and yield of peanut were studied by random block design.Results indicated that under high soil fertility level at Ban-quan site,appropriately reducing density was beneficial for achieving high yield.When planting pattern was SS12 at the density between 200 000 to 220 000 holes/hm2(the pattern includes SS12-75 and SS12-80,e.g.single-seed sowing,hole distance 12 cm,ridge width 75 and 80 cm),the plants grew vigorously with high dry matter accumula-tion and high allocation and transfer rate to pods,with the distribution rate ranged from 58.67%to 59.07%.There-fore,ultimately higher yield could be obtained from higher pods number,higher saturation rate,higher biomass ac-cumulation,and higher economic coefficient.The pod yields of SS12-75 and SS12-80 were 17.36%and 18.98%,both higher than the lowest yield treatment DS16-75(e.g.double-seed sowing,hole distance 16 cm,ridge width 75 cm),and 5.49%and 6.94%higher than the average yield of all treatments,respectively.At low soil fertility level on Laopo site,due to insufficient soil nutrients,plants were stunted,with fewer fruits,lower full pod rate,and lower pro-duction potential per plant.The highest yield was obtained by DS18-70.Patter SS10-70 which using 11.1%less sowing seeds,had a 2.48%lower yield than DS18-70,with only 1.99%less net pod yield.It indicated that both DS18-70 and S10-70 patterns could be selected for production.In order to make full use of natural resources and alleviate inter plant competition,it was suggested to plant by reducing ridge spacing and expanding hole distance.
国家科技期刊平台
NSTL
万方数据
