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混交模式对杉木、红椎混交林生长及土壤养分影响 被引量:6

Effects of Mix Proportions on Growth and Soil Nutrients of Cunninghamia lanceolata and Castanopsis hystrix Mixed Forest
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摘要 为实现杉木人工林科学高效经营,对9年生不同混交模式(10杉、9杉1椎、8杉2椎、7杉3椎、6杉4椎、5杉5椎)杉木+红椎混交林生长量、凋落物量及土壤养分含量的变化进行了研究。结果表明:混交模式显著影响了杉木的生长量与土壤养分含量,其中7杉3椎混交模式下杉木胸径和树高生长量最大,而5杉5椎混交模式下林分凋落物量及土壤中全氮、有效氮、有效磷和有效钾含量最高。在立地指数16的情况下,杉木林中红椎混交比例宜控制在30%以内,过高的红椎混交比例虽改善了土壤养分状况,但受红椎生长竞争优势的影响,杉木生长受到抑制。 In order to realize scientific and efficient management of Cunninghamia lanceolata plantation,the changes of growth,litter amount and soil nutrient contents of nine-year-old C.lanceolata and Castanopsis hystrix mixed forest with several mix proportions(pure C.lanceolata plantation,9∶1,8∶2,7∶3,6∶4,5∶5 C.lanceolata and C.hystrix)was studied.The results showed that mix proportion significantly influenced the growth and soil nutrient content of C.lanceolata.DBH and growth of C.lanceolata were the highest at mix proportion of 7∶3 C.lanceolata to C.hystrix.The litter amount and the contents of total nitrogen,available nitrogen,available phosphorus and available potassium in the soil was the highest at 5∶5 mix proportion.In the forestland with site index 16,the mix proportion of C.lanceolata to C.hystrix should be controlled within 30%.The growth of C.lanceolata was inhibited by the growth competitive advantage of C.hystrix,although the high mixed ratio of C.hystrix improved the soil nutrient.
作者 李裕和 Li Yuhe(Qingyuan Yingde Forest Farm,Qingyuan 511500,Guangdong)
机构地区 清远市英德林场
出处 《防护林科技》 2022年第4期23-26,共4页 Protection Forest Science and Technology
关键词 混交模式 杉木 红椎 地力维持 mixed forest Cunninghamia lanceolata Castanopsis hystrix soil fertility maintenance
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