不同生境下珠芽魔芋叶形态指标、单株产量变化特征及其相关性分析

Leaf Morphological Indexes,Yield Variation Characteristics Per Plant and Correlation Analysis of Amorphophallus Bulbifer in Different Habitats

云南省西双版纳州是我国目前珠芽魔芋种植面积最大的地区,同时也是橡胶林下珠芽魔芋间作面积最大的地区,在我国珠芽魔芋栽培界占据很高的地位。在魔芋原材料紧缺时期,魔芋产量是最受魔芋种植业关注的经济指标。我们调查了西双版纳州珠芽魔芋不同种植模式中单株产量、叶形态指标的变化特征及其相关性,旨在对珠芽魔芋胶园高产间作提供一定的参考作用。结果表明:成龄胶园间作的珠芽魔芋的叶柄长度、叶柄直径、叶盘直径、顶裂叶长及叶面球茎个数的测定值均最大,其次是幼龄胶园间作,最后是玉米间作。幼龄胶园间作的珠芽魔芋单株产量最高,其次是成龄胶园间作,最后是玉米间作。幼龄胶园中珠芽魔芋单株产量与叶柄长度、叶柄直径的正相关均达到极显著水平;成龄胶园中珠芽魔芋叶面球茎个数与叶柄长度、叶柄直径及叶盘直径的正相关均达到显著水平;玉米间作的珠芽魔芋单株产量与叶柄直径有显著正相关。这些结果表明西双版纳州珠芽魔芋最大间作优势在幼龄胶园,其次在成龄胶园,最后在玉米地。

Xishuangbanna Dai Autonomous Prefecture in Yunnan is the largest planting area of Amorphophallus bulbifer in China at present,and also the largest area of intercropping Amorphophallus bulbifer in the rubber plantations.It occupies a very high position in the Amorphophallus bulbifer cultivation field in China.In the period of shortage of konjac raw materials,konjac yield is the most concerned economic indicator of konjac planting industry.In order to provide some references for the high yield of intercropping Amorphophallus bulbifer in the rubber plantations,we investigated the yield per plant in different planting patterns,leaf variation characteristics and correlation of leaf morphological indexes of Amorphophallus bulbifer in different planting patterns in Xishuangbanna Dai Autonomous Prefecture.The results showed that the measurement values of petiole length,petiole diameter,leaf disc diameter,top split leaf length and the number of leaf surface bulbs of Amorphophallus bulbifer in the mature rubber plantation intercropping were the largest,followed by the young rubber plantation intercropping,and finally the corn intercropping.The yield per plant of Amorphophallus bulbifer in the young rubber plantation intercropping was the highest,followed by the mature rubber plantation intercropping,and finally the corn intercropping.The positive correlation between the yield per plant and petiole length and petiole diameter of Amorphophallus bulbifer in the young rubber plantation reached extremely significant level,The positive correlation between the number of leaf surface bulbs and the petiole length,the petiole diameter and leaf disc diameter reached extremely significant level.There was a significant positive correlation between the yield per plant and the petiole diameter of Amorphophallus bulbifer in the the corn intercropping.These results showed that the greatest intercropping advantage of Amorphophallus bulbifer in Xishuangbanna Dai Autonomous Prefecture was in the young rubber plantations,followed by the mature rubber plantations,and finally corn fields.