Abstract: The plant height, weight and leaf number of Brassica campestris were studied under different planting densities by soilless culture and protected cultivation techniques. The results showed that plant growth of A1, A2, A3 and A4 had little difference for their relatively large planting densities at early growth stage. During the mature period, plant growth in different planting density was quite different. The smaller density, growth of the single plant was more favorable, but total yield was lower. The yield of A4 was the highest, up to 45.92 t穐m-2, the growth rate was 30.75%, 50.11%, 121.62%, 129.60%, compared to A1, A2, A3 and A5, respectively. The planting density of A1 was the same with A4 (50 plant穖-2), but the distribution of A4 was conducive to plant growth, so the higher yield of A4.

Key words: soilless culture, protected cultivation, density, Brassica campestris, yield

摘要： 应用无土栽培以及设施栽培技术，对蔬菜‘华冠’上海青进行5个密度栽培，分析不同栽培密度下上海青的株高、株重、叶片数等生长指标。结果表明，A1、A2、A3和A4四个处理的密度相对较大，在定植15 d内均能封行，个体生长差异较小；到成熟期时，不同栽培密度的植株生长势有较大区别，密度越小，单株植株生长越好，但总产量越低。其中，A4产量最高，达45.92 t·hm-2，增产率分别比A1、A2、A3、A5高30.75%、50.11%、121.62%、129.60%；A1与A4栽培密度一样(50棵·m-2)，但A4分布均匀，有利于植株生长发育，因此产量更高。

关键词: 无土栽培, 设施栽培, 密度, 上海青, 产量