弱光条件下不同补光方式对设施番茄幼苗生长的影响

【目的】研究弱光条件下不同补光方式,对冬季设施栽培番茄幼苗生长指标及光合特性的影响。【方法】以时研番茄为试材,三种不同补光方式处理,CK:自然光照条件;T1:8 h非连续补光07:00~11:00、19:00~23:00延长早晚补光方式;T2:12 h连续补光07:00~19:00的辅助日光补光方式,对设施内番茄幼苗生长的影响。【结果】非连续光照8 h(07:00~11:00、19:00~23:00)早晚延长补光方式,即在自然光照条件下,打破黑暗3~4 h较连续光照(07:00~19:00)辅助日光补光方式,番茄幼苗的叶面积增长16.17%,叶面积增长速率加快,干物质积累显著提高23.39%,光合能力增强约22.22%,壮苗指数明显增加。【结论】打破黑暗3~4 h补光方式使幼苗品质得到了提高,并减少能耗,节约能源,为最优处理。

Effects of Different LED Light Compensation Modes on Growth and Development of Tomato Seedlings under Low Light Condition

【Objective】 The objective of this study is to investigate the effects of different light compensation patterns on the growth index and photosynthetic characteristics of tomato seedlings in greenhouses with the low light.【Method】Three different ways of light supplementation: CK: natural light condition; T1: 8 h discontinuous compensation of light 07: 00-11:00: 19:00-23:00 extension of morning and evening supplementation mode; T2: 12 h continuous supplemental sunlight 07: 00-19: 00 auxiliary sunlight supplement mode to exert effects pm the growth of tomato seedlings in facilities.【Result】Discontinuous illumination 8h, extension of light supply in the morning and evening (07:00-11:00, 19:00-23:00), namely, breaking the darkness under natural light condition (07:00-19:00) increased the leaf area of tomato seedlings by 16.17%, accelerated the growth rate of leaf area, significantly raised the accumulation of dry matter by 23.39%, the photosynthetic ability of tomato seedlings was increased about 22.22%, and the index of strong seedling increased remarkably.【Conclusion】Breaking the 3-4 h darkness improves seedling quality, reduced energy consumption and saved energy, which might be the optimal treatment.