摘要
为推广生物炭施肥技术提供理论支撑,研究以广东省肇庆市西江烂柯山自然保护区的3 a生火力楠Michelia macclurei人工林为研究对象,采用双因素随机完全区组设计,设置稻壳炭、秸秆炭、木屑炭(低施量为2 t·hm^(-2);高施量为8 t·hm^(-2))与复合肥(3 t·hm^(-2))配施处理,以单施复合肥为对照(CK)。施肥3个月后,测定株高、地径、叶面积、叶片养分及生理指标。结果表明,与CK相比,低施木屑生物炭处理的株高和地径分别增加7.6%和8.8%;高施木屑生物炭处理的叶片丙二醛含量降低20.9%。低施秸秆生物炭处理的叶片全磷含量较CK提高25.9%,且显著高于其他生物炭处理(P<0.05);高施秸秆生物炭处理的叶片全钾含量与CK差异不显著,显著高于低施稻壳生物炭处理(115.8%,P<0.05)。综上,低施木屑生物炭配施复合肥可促进火力楠幼林株高与地径增长,而秸秆生物炭配施则在促进叶片磷吸收方面表现出相对优势。
To provide a theoretical basis for promoting biochar fertilization technology,a study was conducted in a 3-year-old Michelia macclurei plantation in the Xijiang Lankeshan Nature Reserve,Zhaoqing City,Guangdong Province.A two-factor randomized complete block design was employed,with treatments involving rice husk biochar,straw biochar,or sawdust biochar(low dosage:2 t·hm^(-2);high dosage:8 t·hm^(-2))combined with compound fertilizer(3 t·hm^(-2)),using compound fertilizer alone as the control treatment(CK).Three months after fertilization,tree height,ground diameter,leaf area,leaf nutrient content,and physiological indicators were measured.The results showed that compared with CK,the low dosage sawdust biochar treatment increased tree height and ground diameter by 7.6%and 8.8%,respectively;the high dosage sawdust biochar treatment reduced leaf malondialdehyde content by 20.9%.The low dosage straw biochar treatment increased leaf total phosphorus content by 25.9%compared to CK and was significantly higher than other biochar treatments(P<0.05).The leaf total potassium content in the high dosage straw biochar treatment showed no significant difference from CK but was significantly higher by 115.8%than the low dosage rice husk biochar treatment(P<0.05).In conclusion,the application of low dosage sawdust biochar combined with compound fertilizer promoted height and ground diameter growth in young M.macclurei plantations,while straw biochar combined with fertilizer demonstrated relative advantages in enhancing leaf phosphorus uptake.
作者
李程
帅晓迈
杨佳曼
陈红跃
LI Cheng;SHUAI Xiaomai;YANG Jiaman;CHEN Hongyue(College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,Guangdong 510642,China)
出处
《林业与环境科学》
2025年第4期94-99,共6页
Forestry and Environmental Science
基金
广东省林业科技创新项目(2023KJCX001)。
关键词
火力楠
生物炭
施肥
叶片生理生态
Michelia macclurei
biochar
fertilization
leaf physiological ecology
