杏李“恐龙蛋”栽植密度试验初报

为了明确栽植密度对杏李"恐龙蛋"早期产量和生产的影响。设置行株距分别为2 m×2 m3、m×1.5 m3、m×2 m4、m×1.5 m4、m×2 m于2001~2006年进行杏李"恐龙蛋"栽植密度试验。苗木定植后第2~3年行株距2 m×2 m和3 m×1.5 m处理单位产量明显高于其他处理,但定值后第4~5年就出现树冠内膛郁闭的问题,红点病等病发病率高,难以控制,单位产量明显低于3 m×2 m4、m×1.5 m和4 m×2 m处理。在定植后第6年,行株距4 m×2 m和3 m×2 m处理单位年产量和6年累计产量明显高于其他3个处理,杏李红点病等病情指数较低。合理密度可有效地提高单位面积的产量和果实品质,是杏李恐龙蛋连年丰产、稳产的重要措施,株距4 m×2 m和3 m×2m是杏李恐龙蛋比较适宜的密度栽植模式。

Preliminary Study on Planting Density of Pluot Dinosaur Egg

To define the effect of planting density on early yield and production of pluotvariety-Dinosaur Egg.5 treatments of plant distance between the rows were set up as 2 m×2 m,3 m×1.5 m,3 m×2 m,4 m×1.5 m and 4 m×2 m in the planting density test in 2001～2006.When the seedlings were planted for 2～3 years,the yields per unit area in the density treatments of 2 m×2 m and 3 m×1.5 m were obviously higher than those in other treatments,but when the seedlings were planted for 4～5 years,there appeared some problems of close canopy inside the tree crown and high disease incidence like red spot disease that couldn't be controlled and the yield per unit area was obviously lower than those in the treatments of 3 m×2 m,4 m×1.5 m and 4 m×2 m.When the seedlings were planted for 6 years,the yields per unit area and the accumulative yield in the treatments of 4 m×2 m and 3 m×2 m was remarkably higher than those in other 3 density treatments,with low disease index of red spot disease.Rational density could increase the yield and fruit quality in unit area effectively,which was an important measure for productivity and stable yield of pluot in successive years.The plant distances of 4 m×2 m and 3 m×2 m were more suitable plant density model for pluot variety-Dinosaur Egg.