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不同母质红壤和水分条件对连翘生长的影响
陈秀龙1,2, 郭利平3,2, 沈发兴3,2, 徐爱珍2, 葛佩琳2, 张利超2
1.江西农业大学 国土与资源环境学院 江西省鄱阳湖流域农业资源与生态重点 实验室, 江西 南昌 330045;2.江西省水土保持科学研究院 江西省土壤侵蚀与防治重点实验室, 江西 南昌 330029;3.江西农业大学 林学院 江西省森林培育重点实验室, 江西 南昌 330045
摘要:
[目的] 在南方红壤侵蚀区不同母质发育红壤上种植和筛选适宜生长的连翘属植物生长特性,旨在为连翘资源的规模扩大和推广种植提供科学依据。[方法] 以连翘、金钟花和垂枝连翘为试材,通过人工控水试验在3种母质红壤(花岗岩红壤、红砂岩红壤和第四纪红壤)设计3个水分处理(20 cm深度处土壤基质势控制在-5,-20,-35 kPa),研究不同母质和水分条件对3种连翘属植物生长的影响规律。[结果] ①在3种水分处理条件下,花岗岩红壤种植的连翘属植物,其灌水次数和灌水量最少;第四纪红壤种植的连翘属植物,在-5 kPa水分条件下,其灌水量和灌水次数,与红砂岩红壤相同,在-20 kPa和-35 kPa水分条件下,均高于红砂岩红壤。②土壤水分和土壤类型均显著影响连翘属植物的生长发育,而连翘品种之间却无显著差异;除了土壤水分—连翘品种的交互作用对枝条长度无显著影响外,其他土壤类型、土壤水分、连翘品种之间的双因素交互作用,对连翘属植物生长指标均具有极显著影响。3种连翘属植物中,在高水分条件下(-5 kPa),连翘、金钟花在红砂岩红壤上生长最佳,垂枝连翘在第四纪红壤上生长最佳;随着水分含量下降(-20 kPa和-35 kPa),3种连翘属植物均在第四纪红壤上生长得更好。[结论] 在适宜水分条件下(20 cm深度处土壤基质势>-35 kPa),连翘、金钟花和垂枝连翘在南方红砂岩红壤和第四纪红壤上引种种植是可行的。
关键词:  红壤类型  土壤水分  连翘属植物  生长指标
DOI:10.13961/j.cnki.stbctb.2020.05.011
分类号:Q948.112+.3;S567.1+9
基金项目:国家自然科学基金项目“长江中下游地区花生生长对旱涝胁迫的响应机理及模拟”(41905104),“南岭东部常绿阔叶林主要树种根际与根叶养分对磷添加的响应”(31870427);江西省重点研发计划项目(20181BBG70038);江西省土壤侵蚀与防治重点实验室开放研究基金重点项目(JXSB201803);江西省水利科技项目(KT201620,201820YBKT19,201820YBKT17,201821ZDKT17);江西省水利科技成果重点推广计划(201820TG13)
Effects of Red Soil Derived from Different Parent Materials and Moisture Condition on Growth of Forsythia Plants
Chen Xiulong1,2, Guo Liping3,2, Shen Faxing3,2, Xu Aizhen2, Ge Peilin2, Zhang Lichao2
1.Key Laboratory of Poyang Lake Watershed Agricultural Resources and Ecology of Jiangxi Province, School of Land Resource and Environment, Jiangxi Agricultural University, Nanchang, Jiangxi 330045, China;2.Jiangxi Provincial Key Laboratory of Soil Erosion and Prevention, Jiangxi Institute of Soil and Water Conservation, Nanchang, Jiangxi 330029, China;3.Jiangxi Key Laboratory of Silviculture, College of Forestry, Jiangxi Agricultural University, Nanchang, Jiangxi 330045, China
Abstract:
[Objectives] We planted and screened suitable Forsythia plants for growth on a typical red soil in an eroded red-soil region of South China in order to provide a scientific basis for the scaled expansion and popularization of Forsythia resources.[Methods] F. suspense (P1), F. viridissima (P2), and F. suspensa var. sieboldii (P3) were used as test materials in this study. Three moisture gradients (-5, -20, and -35 kPa) were designed using artificial water control experiment on three types of red soil that were developed from granite (S1), red sandstone (S2), and Quaternary red clay (S3) parent materials. We then analyzed the effects of each type of red soil and moisture condition on the growth of the three Forsythia species.[Results] ① Under the three moisture gradients, the lowest irrigation time and lowest volume of irrigation water for each Forsythia species were on the S1 soil. The irrigation volume and irrigation time of the S3 soil were higher than those of the S2 soil at -20 and -35 kPa, while they were the same at -5 kPa. ② Soil moisture and soil type significantly affected the growth and development of Forsythia plants on the typical red soils; however, no significant difference was observed among the plant species. The interactions between soil type and soil moisture, as well as soil type and Forsythia species had significant effects on all growth indices, and the interaction between soil moisture and Forsythia species had a significant effect on all growth indices excluding branch length. Among the three Forsythia species, under high soil moisture conditions (-5 kPa), the best growth of P1 and P2 occurred in the S2 soil, while P3 grew best in the S3 soil. However, with a decreased moisture content (-20 and -35 kPa), all three Forsythia plants grew best in the S3 soil.[Conclusion] In South China, it is feasible to plant the three Forsythia species under high moisture conditions in red soil that has either red sandstone or Quaternary red clay as the parent material and a soil matrix potential of ≥ -35 kPa.
Key words:  red soil types  soil water content  Forsythia plants  growth indices