关键词: 核桃, 早熟, 品种

Abstract: ‘Yulu’is an early-maturing elite cultivar bred from seedling walnut trees in Chengkou County,Chongqing. The tree vigor is moderate with strong branching ability,and the lateral bud fruiting rate is 78.70%-81.90%. The nuts are round,with a single fruit weight of 12.60-13.20 g. The suture line is relatively convex,the shell thickness is 1.03-1.09 mm,and the kernel yield is 57.90%-60.10%. Kernels are easy to extract as whole pieces,plump,yellow in color,and mellow in taste. In Chongqing,the full blooming period of female flowers is mid-April,that of male flowers is mid-late April,and fruits mature in late August. During the full fruiting period,the nut yield can reach 3 280 kg · hm^-2. The suitable cultivation area is in Chongqing at an altitude of 700-1 600 m,with a soil layer thickness of 1 m or more and a soil pH ranging from 6.5 to 8.0.

Key words: walnut, early maturing, cultivar