橡胶林下不同光质对珠芽魔芋的影响

Effect of Different Light Quality on Coniferous Amorphophallus Konjak under Rubber Plantation

为探索出使橡胶林下珠芽魔芋增产的方法,尝试以珠芽魔芋为实验对象,通过在橡胶林下自然光的基础上添加不同比例的红蓝光组合,研究橡胶林下不同光质对珠芽魔芋耐强光性能和生长量的影响。结果表明,RB组的橡胶树冠层透光率最高,其次是R2B、全光谱、3RB、CK、2RB;通过补光后橡胶林下光强得到了83%左右的提升,使得大部分点位的光强达到60μmol/m^(2)·s以上。由实验数据可知,经过补光的魔芋在生长量、叶绿素含量、光响应曲线方面都显著高于未经过补光的魔芋,其中魔芋植株长势方面R2B的补光效果最佳,而产量方面3RB最佳。因此,通过对橡胶林下魔芋进行一定强度和比例的红蓝光补光,可以增加魔芋的耐强光性能;在林下光照强度很低时提供一定的光照,确保光强高于光补偿点使光合作用正向进行。

In order to explore the method of increasing the yield of Amorphophallus konjak under the rubber plantation,we tried to take Amorphophallus konjakas as the experimental object,via adding different proportion of red-blue light combination on the basis of natural light under the rubber tree,to study the effect of different light quality under the rubber forest on the strong light resistance and growth on Amorphophallus bulbilfer.The results showed that the light transmittance of rubber tree canopy in RB group was the highest,followed by R2B,full spectrum,3RB,CK,2RB;After light compensation,the light intensity under the rubber forest has been increased by about 83%,making the light intensity at most points reach more than 60μmol/m^(2)·s.It can be seen from the experimental data that the growth,chlorophyll content and light response curve of the Konjak with added light are significantly higher than those of the Konjak without added light,among which R2B is the best.Therefore,by adding red-blue light with a certain intensity and proportion to Konjak under the rubber dantation,the strong light resistance of Konjak can be increased and a certain amount of light can be provided when the light intensity under the plantation is very low,so as to ensure that the light intensity is higher than the light compensation point to make photosynthesis go forward.