摘要
茶树修剪枝叶年生物量可达8-9 t·hm^(-2),对茶园生态系统物质循环具有重要影响。但是茶树修剪枝叶及其不同利用方式对茶树生长的影响其调控机制方面研究尚缺乏。本研究通过盆栽实验,研究茶树修剪物直接还田和加工为生物炭施用两种方式对茶树生长的影响,并从土壤理化性状方面分析其调控机制。试验设置三个处理:T1:对照处理,T2:施用茶树修剪物,T3:施用生物炭。结果表明,施用茶树修剪物及其生物炭处理显著促进了茶树生长。具体来讲,T2、T3处理下茶树叶生物量、茎生物量和总生物量均显著高于对照处理,增幅分别达到18.5%-21.2%、15.9%-17.8%和18.1-18.3%。此外,生物炭处理显著促进了茶树根系生长。与对照处理相比,生物炭处理下茶树总根长、根密度和根尖数分别提高41.3%、41.3%和73.4%。茶树修剪物及生物炭处理显著改善了土壤理化指标,包括土壤pH、无机氮、速效磷和速效钾等分别提高7.8%-13.8%、25.2%-176.1%、15.4%-84.1%和486.3%-1500.6%。同时,与对照处理相比,茶树修剪物及其生物炭处理均显著降低了交换性氢、交换性铝和土壤交换性酸的含量,降低幅度分别为6.5%-46.3%、11.0%-27.8%和7.6%-48.0%。此外,冗余分析表明影响茶树形态特征的主要因素为土壤含水率和速效磷(P<0.05)。因此,茶树修剪物及其生物炭施用有利于改善土壤养分状况,促进茶树生长。
The annual biomass of pruned branches and leaves of tea reaches 8-9 t·hm^(-2),which significantly influences the material cycle of tea garden ecosystems.However,research remains limited regarding the effects of pruned tea branches and leaves and their different utilization methods on tea growth,as well as their regulatory mechanisms.This study investigates the effects of two application methods on tea tree growth through pot experiments—directly returning tea pruning Materials to soil versus applying them after processing into biochar,and analyzes the regulation mechanism based on soil physical and chemical properties.This study sets three treatments:T1(control treatment),T2(application of tea pruning materials),T3(application of biochar).The results show that the treatments with tea pruning materials and their biochar significantly promote tea growth.Specifically,under the T2 and T3 treatments,the leaf biomass,stem biomass their biochar significantly promote tea growth.Specifically,under the T2 and T3 treatments,the leaf biomass,stem biomass and total biomass of tea plants are significantly higher than those in the control treatment,with the increase rates reaching 18.5%-21.2%,15.9%-17.8% and 18.1%-18.3%,respectively.In addition,the biochar treatment significantly promotes the root growth of tea plants.Compared with the control treatment,the total root length,root density and root tip number of tea plants treated with biochar increase by 41.3%,41.3% and 73.4% respectively.Both the tea pruning materials treatment and the biochar treatment significantly improve soil physical and chemical indexes,with soil pH,inorganic nitrogen,available phosphorus and available potassium increasing by 7.8%-13.8%,25.2%-176.1%,15.4%-84.1% and 486.3%-1500.6%,respectively.Meanwhile,compared with the control treatment,tea pruning materials treatment and their biochar treatment significantly reduce the contents of exchangeable hydrogen,exchangeable aluminum and soil exchangeable acid,with reduction ranges of 6.5%-46.3%,11.0%-27.8% and 7.6%-48.0%,respectively.In addition,redundancy analysis shows that soil moisture content and available phosphorus are the main factors affecting tea morphological characteristics(P<0.05).Therefore,the application of tea pruning materials and their biochar is beneficial for improving soil nutrient status and promoting tea growth.
作者
刘悦萱
王海兵
胡强
董雅洁
于泉
颜鹏
李鑫
陈延玲
LIU Yue-xuan;WANG Hai-bing;HU Qiang;DONG Ya-jie;YU Quan;YAN Peng;LI Xin;CHEN Yan-ling(College of Resource and Environmental Sciences/Qingdao Agricultural University,Qingdao 266109/China;Key Laboratory of Tea Quality and Safety Control/Ministry of Agriculture,Tea Research Institute/Chinese Academy of Agricultural Sciences,Hangzhou 310008/China;Pu’er University/College of Tea and Coffee College,Pu'er 665000/China)
出处
《山东农业大学学报(自然科学版)》
北大核心
2025年第6期956-966,共11页
Journal of Shandong Agricultural University:Natural Science Edition
基金
“浙江省‘尖兵’‘领雁’研发攻关计划”(2022C02046)
浙江省“三农九方”科技协作计划项目(2024SNJF031)
中国农业科学院科技创新工程(CAASZDRW202417)
国家自然科学基金青年科学基金(42007096)。
