“蔡家坡红皮蒜”是陕西省一个优良的大蒜品种。但是,当从原产地引入其他地区,连续栽培几年后,就有显著减产现象。已有的研究指出,造成减产的主要原因是由于引入地区在栽培上采用了高度密植、晚豁抽苔等方法,从而影响了蒜头蒜瓣的充分生长发育(任省鉴等,1963)。至于由此而引起的减产,是否属于种性退化,人们的看法各不相同。另外,大蒜栽培中蒜苔和鳞茎的产量～密度曲线并不一致,也就是说,蒜苔和鳞茎的最高产量并不出现于同一个栽植密度等级上,因此在生产上究竟怎样规划栽植密度,尚难于确定。为了进一步探讨这些问题,我们研究了栽植密度和种瓣对大蒜产量和鳞茎性状的影响。 栽植密度设四个处理:20,000、25,000、33,000、60,000株/亩,各处理的播种材料,采用原产区通用的蒜瓣。不同的种瓣包括两个处理:一为从原产区(蔡家坡)获得的种瓣,一为从引入地区(武功)获得的同品种的种瓣,栽植密度同于原产区的一般情况,即每亩25,000株。现将试验结果简报如后: 一、栽植密度和种瓣对蒜苔和鳞茎产量的影响 “Caijiapo red garlic” is an excellent garlic varieties in Shaanxi Province. However, when introduced from other places of origin and cultivated continuously for several years, there has been a significant reduction in production. It has been pointed out that the main reason for the decrease in production is due to the introduction of highly dense planting and late-bolting-moss cultivation in the introduced areas, thereby affecting the full growth and development of garlic cloves (Ren Jijian et al., 1963). As to whether the reduction caused by this is a kind of degenerative species, people think differently. In addition, garlic cultivation and bulb yield ~ density curve is not consistent, that is, the highest yield of garlic and bulb does not appear in the same planting density level, so how to plan the planting density in the production, it is difficult to determine . In order to further explore these issues, we studied the effects of planting density and petals on garlic yield and bulb traits. Set the density of four treatment: 20,000,25,000,33,000,60,000 / mu, the treatment of the sown material, the common origin garlic clove. The different types of petals include two treatments: one is the type of petals obtained from the producing area (Caijiapo); the other is the type of petals of the same species obtained from the introduced area (Wugong); the planting density is the same as that of the original producing area; That is 25,000 plants per acre. Now the experimental results are briefly described as follows: First, the planting density and seed petals on the yield of garlic and bulbs