LED光质对上海青与樱桃萝卜早期生长的影响

Effects of LED Light Quality on the Early Growth of Shanghaiqing and Cherry Radish

不同光质或波长的光,具有明显不同的生物学效应,包括植物的形态建成、光合作用、器官生长发育、品质形成等。为探索适宜种植不同食用器官蔬菜的最佳光谱,以上海青油菜和樱桃萝卜为试验材料,探索不同光质对叶菜类蔬菜和根菜类蔬菜地上部、地下部形态建成的影响。通过仿日光LED(λp=640 nm,Δλ=132 nm)为对照,设红光LED(λp=640 nm,Δλ=10 nm)、红/蓝(5∶1)、蓝光LED(λp=460 nm,Δλ=10 nm)处理,测量早期株幅、株高等生长变化。结果表明:不同光质处理对株幅、真叶的数量无显著影响。相对仿日光(对照),蓝光下植株显著矮化,但地上部鲜重无显著变化;红光促进株高,地上部鲜重显著增加。红/蓝光(5∶1)显著提高了叶菜株高及鲜重,但对根菜株高、地上鲜重、肉质根鲜重及膨大直径均无显著作用。初步表明红光LED(λp=640 nm,Δλ=10 nm)和蓝光LED(λp=460 nm,Δλ=10 nm)不利于肉质根正常膨大;较高红蓝光质比(5∶1)和红光LED可有效促进叶菜植株生长,提高产量。

Different light qualities or wavelengths have distinct biological effects,including different effects on plant morphogenesis,photosynthesis,organ growth and development,and quality formation.In order to explore the optimum spectra for different vegetables growing,Shanghaiqing and cherry radish were the materials cultivated in half-day balcony with photosynthetic photon flux density180μmol·m^-2·s^-1,16 h·d^-1,to analyze the effects of different light quality on morphogenesis of upper and underground parts of leaf vegetable and root vegetable.The early biomass changes were measured.The results showed that in contrast to sun-like light LED(λp=640 nm,Δλ=132 nm),blue light LED(λp=460 nm,Δλ=10 nm)inhibited plant height,and red light LED(λp=640 nm,Δλ=10 nm)promoted plant height and increase fresh weight of aerial parts significantly.Red∶blue(5∶1)significantly increased the shoot growth of Shanghaiqing rape,but had no significant effect on cherry radish.The red light or blue light was not conducive to the growth and yield of root vegetable.Red∶blue(5∶1)could effectively promote the growth of leaf vegetable and the yields.