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以北京地区连栋温室长季节岩棉栽培番茄为试材,研究了不同密度对番茄冠层光照分布、番茄生长发育、营养液吸收利用的影响。结果表明:番茄冠层内光合有效辐射值随栽培密度增加而显著降低,其中晴天条件下4.2株/m2植株中部光合有效辐射值约为360μmol·m-2·s-1,比对照2.8株/m2降低22.4%。随着栽培密度增加,番茄营养生长减弱,植株发病率增加,且坐果数减少,单果重降低,增加栽培密度的增产效果不显著。经综合比较,推荐2.8株/m2为北京地区连栋温室番茄岩棉栽培的适宜栽培密度。
The effects of different densities on the light distribution of tomato canopy, growth and development of tomato and the absorption and utilization of nutrient solution were studied by using the rock-solidified rockwool growing tomato in continuous greenhouse in Beijing. The results showed that the photosynthetically active radiation (PAR) of tomato canopy decreased significantly with the increase of planting density, and the photosynthetic active radiation value of the middle part of 4.2 plants / m2 was about 360 μmol · m-2 · s-1 in sunny days, 2.8 plants / m2 decreased by 22.4%. With the increase of planting density, the growth of tomato decreased, the incidence of plant increased, the number of fruit set decreased, the weight of single fruit decreased, and the increase of planting density was not significant. After a comprehensive comparison, it is recommended that 2.8 plants / m2 is suitable planting density for tomato rock wool cultivation in Beijing multi-span greenhouse.