不同种植密度对高原莴笋农艺性状、产量和经济效益的影响

Effects of Different Planting Densities on Agronomic Traits,Yield and Economic Benefit of Plateau Lettuce

莴笋是四川高原地区夏秋季种植的主要蔬菜,为筛选出高原莴笋适宜的种植密度,开展不同种植密度对高原莴笋农艺性状和产量的影响研究。以当地主栽莴笋品种种都青为试验材料,共设5个种植密度,以当地菜农种植密度为对照(CK,7000株/667 m^(2),36 cm×26 cm),设其他4个种植密度梯度:T_(1)(8400株/667 m^(2),28 cm×26 cm)、T_(2)(8000株/667 m^(2),26 cm×30 cm)、T_(3)(6700株/667 m^(2),26 cm×35 cm)、T_(4)(5400株/667 m^(2),36 cm×32 cm)。结果表明,T_(1)和T_(2)的667 m^(2)折合净产量和净收益较大,分别为5702.85 kg、11583.55元和5695.44 kg、11617.32元,且二者的食用茎粗和茎长适中、皮薄,商品性好,深受消费者欢迎。因此,推荐8000~8400株/667 m^(2)是高原莴笋适宜的种植密度。

Lettuce is the main vegetable planted in summer and autumn in Sichuan plateau area.In order to screen out the suitable planting density of lettuce in plateau,the effects of different planting densities on the agronomic traits and yield of lettuce were studied.The local main lettuce cultivar Zhongduqing was used as the test material,and 5 planting densities were set.The local vegetable planting density was used as the control(CK,7000 plants/667 m^(2),36 cm×26 cm),and four different planting density gradients were set:T_(1)(8400 plants/667 m^(2),28 cm×26 cm),T_(2)(8000 plants/667 m^(2),26 cm×30 cm),T_(3)(6700 plants/667 m^(2),26 cm×35 cm)and T_(4)(5400 plants/667 m^(2),36 cm×32 cm).The results showed that T_(1)and T_(2)had larger net yield and net income of 5702.85 kg/667 m^(2),11583.55 yuan/667 m^(2),and 5695.44 kg/667 m^(2),11617.32 yuan/667 m^(2),respectively.And both of them were popular for their moderate thickness and length of edible stems,thin skin and good commercialization.Therefore,it is recommended that 8000-8400 plants/667 m^(2)is the suitable planting density for plateau lettuce.