摘要
【目的】研究不同套种模式对油茶幼林土壤理化性质及酶活性的影响,为筛选出适宜推广的油茶幼林经营模式及合理施肥提供理论依据。【方法】以2017年种植的油茶幼林为试验地,2021—2023年连续分别套种黄豆、花生、玉米、箭舌豌豆、辣椒,以油茶纯林为对照(CK),测定土壤理化性质及酶活性等指标,计算单项及综合肥力指数。【结果】不同套种模式的油茶根围土壤有机质含量以套种花生最高,比CK提高119.80%,套种辣椒土壤有机质含量最低,比CK提高74.54%;全氮含量最高是箭舌豌豆,是CK的3.92倍,最低是玉米,是CK的2.88倍;碱解氮含量排序为箭舌豌豆>花生>黄豆>玉米>辣椒>CK,其含量在54.68~153.56 g/kg;全磷和有效磷含量最低的是辣椒,分别是CK的2.33和1.06倍。套种花生的有效铜、有效锰、有效锌含量均高于其他套种模式,且显著高于CK(P<0.05,下同);套种玉米的有效铁含量显著高于其余模式;套种箭舌豌豆的有效硼含量显著高于其余模式。油茶根围土壤酸性磷酸酶(ACP)活性以箭舌豌豆最高,是CK的2.88倍;土壤过氧化氢酶(CAT)活性以花生最高,是CK的2.32倍;各套种模式间的土壤蔗糖酶(SC)和脲酶(UE)活性差异不显著(P>0.05),但均与CK差异显著。不同套种模式土壤综合肥力指数排序依次为花生>箭舌豌豆>黄豆=玉米>辣椒>CK,花生的土壤综合肥力等级评价为Ⅱ级,其他套种模式均为Ⅲ级。【结论】油茶套种花生对改善土壤理化性质及酶活性的效果最好,综合肥力指数最高,是适合喀斯特地区推广的套种模式。
【Objective】To study the effects of different intercropping modes on the physicochemical properties and enzyme activity of soil in young Camellia oleifera forests,and to provide theoretical basis for selecting suitable management modes and rational fertilization for young C.oleifera forests.【Method】The young C.oleifera forest planted in 2017 was used as the experimental site.From 2021 to 2023,it was planted consecutively with soybean,peanut,corn,common vetch and pepper respectively.With the pure C.oleifera plantation as the control(CK),the soil physical and chemical properties and enzymes activity were measured,and the single and comprehensive fertility indexes were calculated.【Result】The organic matter content in the rhizosphere soil of C.oleifera under intercropping with peanuts was the highest among all the intercropping modes,which increased by 119.80%compared to CK,while intercropping with peppers had the lowest organic matter content,which increased by 74.54%compared to CK.The highest total nitrogen content was in the common vetch intercropping mode,which was 3.92 times as that of CK,and the lowest was in corn intercropping mode,which was 2.88 times as that of CK.The content of alkali hydrolyzable nitrogen was in the order of common vetch>peanut>soybean>corn>pepper>CK,and the content ranged from 54.68 to 153.56 g/kg.Intercropping peppers had the lowest total phosphorus and available phosphorus contents,which were 2.33 and 1.06 times as those of CK,respectively.The content of available copper,available manganese,and available zinc in intercropping peanut mode was the higher compared to other modes,and the difference was significant compared to CK(P<0.05,the same below).The effective iron content of intercropping corn mode was significantly higher than other modes.The effective boron content of intercropping common vetch mode was significantly higher than other modes.The acid phosphatase activity(ACP)in the rhizosphere soil of C.oleifera was the highest in intercropping common vetch mode,which was
作者
秦维
曾维军
刘燕
罗文敏
刘盈盈
贺红早
QIN Wei;ZENG Wei-jun;LIU Yan;LUO Wen-min;LIU Ying-ying;HE Hong-zao(Guizhou Institute of Biology,Guiyang,Guizhou 550025,China)
出处
《南方农业学报》
CAS
CSCD
北大核心
2024年第4期1099-1106,共8页
Journal of Southern Agriculture
基金
贵州省科技成果转化项目(黔科合支撑[2022]重点017)
贵州省林业局林业科学技术研究项目(黔林科合[2023]08)
贵州省高层次创新型人才项目(黔科合平台人才-GCC[2023]073)。
关键词
油茶
套种
土壤肥力
酶活性
Camellia oleifera
interplanting
soil fertility
enzyme activity
