Optimization of Plant Pattern of Interplanting Potato and Rapeseed

Plant patterns of interplanting potato(Solanum tuberosum L.) and rapeseed(Brassica campestris L.) were optimized by testing the yield of potato and rapeseed.Results showed that under the conditions of normal sowing of rapeseed(Sowing seed on the 10th of Sept,and transplanting seedlings on the 10th of Oct,or direct seeding on the 25th of Sept),interplanting of rapeseed and potato had no obvious effect on the yield of potato and rapeseed(compared to CK in which rapeseed was plant alone).Under the same planting pattern with the same sowing time,the yield of rapeseed with different planting density differed significantly.The yield of interplanting pattern in which seeds were sown on the 10th of Sept,and transplanting on the 10th of Oct,or interplanting on the 25th of Sept was the highest.Transplanting rapeseed or direct seeding rapeseed at suitable sowing time could both obtain high yield with suitable planting density.Considering yield and economic efficiency,interplanting of direct-seeding rapeseed on the 25th of Sept at the density of 225 000 ind./ hm2 could balance the yield of potato and rapeseed and economic efficiency level.