摘要
探讨不同杉木混交造林对土壤表层养分含量及土壤酶活性的影响,为杉木人工纯林的科学管理提供理论依据。本研究以杉木+红锥+柳杉+米槠(混交林1)、杉木+红锥+福建柏+南方红豆杉(混交林2)、杉木+马尾松+米老排+南方红豆杉(混交林3)4树种混交林及杉木人工纯林为研究对象,分析不同林分土壤养分和土壤酶活性的差异及其之间的关系。结果表明:与杉木人工纯林相比,混交林中的土壤可溶性有机氮(DON)较高,混交林1和混交林3的土壤微生物生物碳含量(MBC)比杉木人工纯林分别提高了37.82%和1.84%,混交林中土壤DOC∶DON均显著低于杉木人工纯林(P<0.05),土壤MBC∶MBN则显著高于杉木人工纯林(P<0.05);混交林中的酸性磷酸酶活性(AP)显著高于杉木人工纯林(P<0.05)。相关分析表明,土壤全碳(TC)、全氮(TN)(P<0.01)、DON(P<0.05)与土壤β-葡萄糖苷酶活性(BG)、酸性磷酸酶(AP)活性呈显著正相关。研究表明,与杉木人工纯林相比,尽管在幼林期间,杉木混交林的造林模式可以更好地改善土壤有机氮、微生物碳含量及土壤微生物生物量碳氮比,进而影响土壤酶活性,更有利于改善杉木人工纯林的土壤质量。
The effects of different mixed afforestation of Chinese fir on the content of nutrient in soil surface and soil enzyme activity were discussed,which could provide theoretical basis for the scientific management of the pure artificial plantation forest of Chinese fir.In this study,the mixed forests of four tree species,including Cunninghamia lanceolata+Castanopsis hystrix+Cryptomeria japonica+Castanopsis carlesii(the mixed forest 1),Cunninghamia lanceolata+Castanopsis hystrix+Fokienia hodginsii+Taxus wallichiana(the mixed forest 2),Cunninghamia lanceolata+Pinus massoniana+Mytilaria laosensis+Taxus wallichiana(the mixed forest 3),and the pure artificial plantation forest of Chinese fir were used as the research objects to analyze the differences of soil nutrients and soil enzyme activities in different stands and the relationship between them.The results showed that:Compared with the pure Chinese fir plantation forest,the soil dissolved organic nitrogen(DON)in the mixed forest was higher,and the soil microbial biomass carbon(MBC)in the mixed forest 1 and the mixed forest 3 was 37.82%and 1.84%higher than that in the pure Chinese fir plantation forest,respectively.The soil DOC∶DON in the mixed forest was significantly lower than that in the pure Chinese fir plantation forest(P<0.05),while the soil MBC∶MBN in the mixed forest was significantly higher than that in the pure Chinese fir plantation forest(P<0.05).The acid phosphatase(AP)activity in the mixed forest was significantly higher than that in the pure Chinese fir plantation forest(P<0.05).The correlation analysis showed that the soil total carbon(TC),total nitrogen(TN)(P<0.01)and DON(P<0.05)were significantly positively correlated with the soilβ-glucosidase(BG)activity and acid phosphatase(AP)activity.The research showed that:compared with the pure Chinese fir plantation forest,although the afforestation model of the mixed forest of Chinese fir could better improve the soil organic nitrogen content,microbial carbon content and soil microbial biomass carbon-
作者
崔莹莹
何露露
叶浩然
冯莉绚
王思荣
CUI Ying-ying;HE Lu-lu;YE Hao-ran;FENG Li-xuan;WANG Si-rong(School of Geography Science,Fujian Normal University,Fuzhou,Fujian 350007,China;State Key Laboratory Cultivation Base of Humid Subtropical Mountain Ecology,Fuzhou,Fujian 350007,China;Baisha State-owned Forest Farm of Shanghang County,Longyan,Fujian 364305,China)
出处
《福建农业科技》
CAS
2023年第8期10-16,共7页
Fujian Agricultural Science and Technology
基金
福建省自然科学基金项目重点项目(2022J02025)。
关键词
杉木
混交林
土壤养分
土壤酶活性
Cunninghamia lanceolata
Mixed forest
Soil nutrient
Soil enzyme activity
