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以富源花魔芋为试材,采用大棚盆栽种植方式进行了不同钾处理(处理0、1、2、3的K2SO_4施用量分别为0.0、2.2、4.4、6.6g/株)的魔芋种植试验,并在施钾肥后5、15、30、60d测定了富源花魔芋叶片叶绿素、可溶性蛋白质、可溶性糖、丙二醛(MDA)含量以及超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)活性。结果表明:施用适量硫酸钾(处理2)有利于提高叶片叶绿素、可溶性蛋白质、可溶性糖含量,增强了叶片SOD、CAT、POD活性,降低了魔芋叶片MDA含量,对魔芋抗氧化酶系统以及膜质过氧化系统有一定的生理效果,增强了魔芋植株抵抗逆境和抗衰老的能力,进而影响了叶片的光合作用和同化物的合成、转化和运输,获得了魔芋的高产。处理2收获时大芋重量为485.71g,折合产量36 428.25kg/hm~2,是处理0的1.50倍,是处理3的1.56倍。
Taking Fuyuan konjac as experimental material, different potassium treatments (treatments 0, 1, 2 and 3 of K2SO_4 were 0.0, 2.2, 4.4 and 6.6g / plant) The contents of chlorophyll, soluble protein, soluble sugar, malondialdehyde (MDA), superoxide dismutase (SOD), peroxidase (POD) Catalase (CAT) activity. The results showed that applying appropriate amount of potassium sulfate (treatment 2) was beneficial to increase the content of chlorophyll, soluble protein and soluble sugar, and enhanced the activities of SOD, CAT and POD in leaves, and decreased the content of MDA in the leaves of konjac. The antioxidant enzyme system, Peroxidation system has certain physiological effects, enhance the ability of konjac plant to resist adversity and anti-aging, thus affecting the photosynthesis of leaves and the synthesis, transformation and transport of assimilation, access to the yield of konjac. Processing 2 large taro harvest weight 485.71g, equivalent to yield 36 428.25kg / hm ~ 2, is 0.50 times the treatment 0, 1.56 times the treatment 3.