| 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。 |
| 关键词: 火力楠 生物炭 施肥 叶片生理生态 |
| DOI：10. 20221 / j. cnki. 2096-2053. 202504012 |
| 分类号: |
| 基金项目:广东省林业科技创新项目 (2023KJCX001)。 |
|
| Effects of Biochar Amendment with Fertilization on Growth and Leaf Physiological Ecology of Young Michelia macclurei Plantations |
|
licheng, shuaixiaomai, yangjiaman, chenhongyue
|
|
South China Agricultural University
|
| Abstract: |
| 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. |
| Key words: Michelia macclurei biochar fertilization leaf physiological ecology |
