不同钾处理对富源花魔芋生理特性和产量的影响

Effect of Different Potassium Treatments on Physiological Characteristics and Production of Amorphophallus konjac cv.‘Fuyuan'

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。

Using Amorphophallus konjac cv.‘Fuyuan＇as test material,the planting test was conducted under the different potassium treatments（the K2SO_4 application amount of the treatment 0,1,2,3was respectively 0.0,2.2,4.4,6.6g/plant）by the greenhouses potted planting.Chlorophyll content,soluble protein content,soluble sugar content,malondialdehyde（MDA）content,superoxide dismutase（SOD）activity,peroxidase（POD）activity,catalase（CAT）activity of A.konjac‘Fuyuan＇were measured on 5,15,30,60 days after using different amount of K2SO_4.The results showed that the appropriate potassium amount（treatment 2）was help to improve the content of the chlorophyll and the soluble protein and the soluble sugar,to enhance the activity of SOD and CAT and POD,to decrease the content of MDA in the leaves of A.konjac‘Fuyuan＇.That had certain physiological effects on the antioxidant enzyme system and the membranous peroxide system,and enhanced the ability of the plant to resist the stress and the slow death,and thereby affected the photosynthesis synthesis and the synthesis,the conversion and the transport of the assimilation,so that the high yield was obtained.When the treatment 2was applied,the harvest large taro weight was the highest up to 485.71 g with the equivalent yield 36 428.25kg/hm^2,which was 1.50 times that of the treatment 0and 1.56 times that of the treatment 3.