麻渣还田背景下不同钾水平对剑麻生长和叶绿素荧光特性的影响

采用盆栽试验,设置了不同梯度的麻渣配施化学钾肥处理,并测定了剑麻的生长指标和叶绿素荧光参数。结果显示:与不施用钾肥处理(NP)相比,施用化学钾(NP+K)和麻渣(NP+ST)2处理对剑麻叶片宽度、单叶生物量、增叶数、总叶片生物量有显著的影响。施用麻渣处理(NP+ST)和施用化学钾肥处理(NP+K)对剑麻生长指标没有显著差异。麻渣的某些养分元素对提高剑麻叶片的叶绿素含量有显著效果。施麻渣配施1/2化学钾肥处理(NP+ST+1/2K)具有最大的光能转化效率和最强的耐受性,显著提高了剑麻的生物量;在当前钾肥推荐用量100 g/(株·年)]下,施用麻渣可以节省一半的化学钾肥用量50 g/(株·年)]。麻渣配施1/2化学钾肥处理(NP+ST+1/2K)对剑麻具有最大的光能转化效率和最佳的生长效果。建议在剑麻大田生产中,施足麻渣有机肥,配施化学钾肥推荐用量的50%,即50 g/(株·年)。

Effect of Different Levels of Potassium on Growth and Chlorophyll Fluorescence Characteristics of Sisal Under the Background of Straw Returning

The purpose of this study is to find the K chemical fertilizer project under the background of straw residue;In this study,sisal growth index and chlorophyll fluorescence parameters were determined by setting different gradient residue fertilizer chemical potassium fertilizer;The result showed that the application of residue processing (NP+ST) and the application of chemical fertilizer treatment (NP+K) of sisal growth index had no significant difference.Some nutrient elements dregs had significant effects on the chlorophyll content of sisal leaves.The application of fertilizer residue 1/2 potassium fertilizer treatment (NP+ST+1/2K) with tolerance to the biggest and strongest light energy conversion efficiency,significantly increased the biomass of sisal.The application of potassium fertilizer residue could save half of the amount of the recommended dosage.Sisal residue could replace chemical fertilizer to a certain extent,but an appropriate chemical fertilizer is need.Sisal residue and 1/2chemical potassium mixed treatment (NP+ST+1/2K) had the largest light energy conversion efficiency and the best growth effect.It is suggested that enough sisal residue added with 50 g of chemical potassium fertilizer per plant be beneficial to the production of sisal.