【摘要】 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,7 000株/667 m²,36 cm×26 cm），设其他4个种植密度梯度：T₁（8 400株/667 m²,28 cm×26 cm）、T₂（8 000株/667 m²,26 cm×30 cm）、T₃（6 700株/667 m²,26 cm×35 cm）、T₄（5 400株/667 m²,36 cm×32 cm）。结果表明，T₁和T₂的667 m²折合净产量和净收益较大，分别为5 702.85 kg、11 583.55元和5 695.44 kg、11 617.32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8 000～8 400株/667 m²是高原莴笋适宜的种植密度。更多还原

【Abstract】 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, 7 000 plants/667 m2, 36 cm×26 cm), and four different planting density gradients were set: T1(8 400 plants/667 m2, 28 cm×26 cm), T2(8 000 plants/667 m2, 26 cm×30 cm), T3(6 700 plants/667 m2, 26 cm×35 cm) and T4(5 400 plants/667 m2, 36 cm×32 cm). The results showed that T1and T2had larger net yield and net income of 5 702.85 kg/667 m2, 11 583.55 yuan/667 m2, and 5 695.44 kg/667 m2, 11 617.32 yuan/667 m2,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 8 000-8 400 plants/667 m2is the suitable planting density for plateau lettuce.更多还原