摘要
以大花序桉苗木为试验材料,采用双因素随机区组试验设计,分析保水剂和桉树专用肥各4个用量水平配施对苗木生长和生理生化特性的影响。结果表明:保水剂、专用肥用量的主效应及二者交互作用对大花序桉的苗高增长量、地径增长量、叶养分含量、叶养分化学计量比(N/P、N/K)、光合特征以及部分抗氧化酶活性均有极显著影响。保水剂和专用肥配施有利于苗高增长量、地径增长量和总生物量的增加,均在W_(2)M_(2)下有最大值,分别是CK的2.23倍、1.85倍和1.20倍。W_(2)M_(3)下,叶全氮、全磷含量最高;各处理下叶N/P高于CK,K/P均小于3.4,苗木生长主要受K元素限制,N元素限制较CK有减缓趋势。保水剂和专用肥配施可显著提高苗木光合能力和抗氧化酶活性。隶属函数分析结果表明,W_(2)M_(2)下大花序桉苗木生长、生理生化状况最佳。保水剂和专用肥配施有利于促进大花序桉苗木的生长,适宜施用量为保水剂5 g/株+专用肥100 g/株。
Using Eucalyptus cloeziana seedlings as experimental materials,a two-factor randomized block design was employed to assess 4 dosage levels of super water-absorbent polymer and 4 eucalyptus-specific fertilizer on the seedling growth,physiological traits and biochemical characteristics.The results showed that the main effects of super water-absorbent polymer,special fertilizer dosage and their interactions had highly significant effects on seedling height,diameter growth,leaf nutrient content,leaf nutrient stoichiometric ratios(N/P,N/K),photosynthetic characteristics and antioxidant enzymes activity.The combination of super water-absorbent polymer and fertilizer promoted seedling height,diameter and total biomass,with the highest values observed under the W_(2)M_(2) treatment,which were 2.23,1.85 and 1.20 times of the control,respectively.Under the W_(2)M_(3) treatment,leaf total nitrogen and phosphorus contents were the highest,and leaf N/P rations were higher than the control across all treatments.However,K/P ratios were below 3.4,indicating potassium limitation,while N limitation showed a tendency to diminish compared to the control.The combination of super water-absorbent polymer and special fertilizer significantly improved the photosynthetic capacity and antioxidant enzyme activities of seedlings.Affiliation function analysis showed that the seedling growth,physiological and biochemical conditions were optimal under the W_(2)M_(2) treatment.In conclusion,the combination of 5 g/plant of super water-absorbent polymer and 100 g/plant of specialized fertilizer is most beneficial for promoting the growth of E.cloeziana seedlings.
作者
韦思宇
黄勇
左秋玉
杨梅
徐圆圆
Wei Siyu;Huang Yong;Zuo Qiuyu;Yang Mei;Xu Yuanyuan(Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-growing Timber in Central South China/Key Laboratory for Cultivation and Utilization of Sub-tropical Forest Plantation in Universities of Guangxi,College of Forestry,Guangxi University,Nanning Guangxi 530004,China;Guangxi Gaofeng State-owned Forest Farm,Nanning Guangxi 530001,China)
出处
《西南林业大学学报(自然科学)》
2025年第5期23-30,共8页
Journal of Southwest Forestry University:Natural Sciences
基金
广西自然科学基金重点项目(2021GXNSFDA196003)资助。
关键词
大花序桉
保水剂
专用肥
生长
生理
生化
Eucalyptus cloeziana
super water-absorbent polymer
specific fertilizer
growth
physiology
biochemistry
作者简介
第1作者:韦思宇(1999—),女,硕士研究生。研究方向:森林培育。Email:1301690532@qq.com。;通信作者:徐圆圆(1991—),女,博士,讲师。研究方向:森林培育。Email:yuanyaunxu@gxu.edu.cn。
