| 周靖超,蒲勇,焦银龙,杨鎏璘,杨佳,杜磊,张锡洲,李廷轩.不同品种茶树修剪叶分解及碳氮磷释放动态特征[J].农业环境科学学报,2024,43(7):1657-1665. |
| 不同品种茶树修剪叶分解及碳氮磷释放动态特征 |
| Decomposition rate and C，N，P release dynamics of pruning litter from different tea varieties |
| 投稿时间：2023-06-16 |
| DOI：10.11654/jaes.2023-0475 |
| 中文关键词: 茶树品种 茶树修剪叶 分解动态 养分释放 |
| 英文关键词: tea variety tea pruning litter dynamics of decomposition nutrient release |
| 基金项目:四川农业大学学科建设双支计划特色创新团队项目（T202103） |
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| 中文摘要: |
| 为阐明不同品种茶树修剪叶初始化学组成对其分解和养分释放的影响，以川西低山丘陵区福鼎大白（C.sinensis，FudingDabaicha）、川茶3号（Chuancha No.3）、川沐217（Chuanmu No.217）和川农黄芽早（Chuannong Huangyazao）4个典型品种茶树的修剪叶为研究对象，采用分解袋法进行为期360 d的室内模拟分解试验，探讨修剪叶分解动态及其碳（C）、氮（N）、磷（P）元素释放特征。结果表明：4个品种茶树修剪叶前期（0~120 d）分解较快、后期（121~360 d）分解较慢，分解半衰期在1.20~1.43 a。川沐217和福鼎大白茶树修剪叶分解较快，分解系数比川茶3号和川农黄芽早高11.7%~18.5%。初始化学组成的C含量、纤维素含量和木质素含量是影响茶树修剪叶分解速率的主要因素。4个品种茶树修剪叶的C、P元素均为直接释放模式；福鼎大白和川茶3号茶树修剪叶的N元素为直接释放模式，川沐217和川农黄芽早茶树修剪叶的N元素属于淋溶-积累-释放模式。茶树修剪叶的C、N、P元素释放因品种和分解时期的不同而不同，且受到初始化学组成N、P含量的影响。在分解过程中，福鼎大白和川农黄芽早修剪叶的C、N释放率较高，川茶 3 号和川沐 217 修剪叶的 P 释放率较高。4 个品种茶树修剪叶 C、N、P 元素的释放率分别为 36.1%~44.5%、53.8%~58.3%、65.4%~71.5%。因此，在茶树修剪叶归还过程中可考虑采用堆肥等方式以促进木质素和纤维素的降解，修剪过后适量施氮以抑制修剪叶N元素的释放，从而提升茶树对修剪叶的养分利用效率。 |
| 英文摘要: |
| A 360-day decomposition experiment was conducted to clarify the effect of initial chemical composition of pruning litter of different tea varieties on litter decomposition and nutrient release. The study material was the pruning litter of four typical tea varieties in the low mountain and hilly areas of western Sichuan：Camellia sinensis“Fuding Dabaicha”,“Chuancha”No.3,“Chuanmu”No.217, and “Chuannong Huangyazao”. The results showed that the half-life of the decomposition of the pruning litter from the four tea varieties was 1.20~1.43 years. The rate of mass loss was highest in the early stage（0-120 days）and lowest in the late stage（121-360 days）. The pruning litter of“Chuanmu”No.217 and“Fuding Dabaicha”decomposed at a rate that was 11.7%-18.5% higher than that of“Chuancha” No.3 and“Chuannong Huangyazao”. The C content as well as the concentration of cellulose and lignin concentration of the initial litter material were the main factors affecting the mass loss rate. The C and P of the pruning litter was released directly. The N contained in the pruning litter of“Fuding Dabaicha”and“Chuancha”No.3 was released directly, whereas N was released from“Chuanmu”No.217 and “Chuannong Huangyazao”in a“leaching-enrichment-release”mode. The release of C, N, and P from tea plantation litter varies depending on the tea variety and decomposition period and is affected by the initial N and P content. At the end of decomposition experiment, the C and N in the pruning litter of“Chuannong Huangyazao”and C. sinensis“Fuding Dabaicha”was released faster than was the P in pruning litter of“Chuancha”No. 3 and“Chuanmu”No.217. The total nutrient release from the pruning litter of all four tea varieties was 36.1%- 44.5% of the initial C content, 53.8%-58.3% of the N, and 65.4%-71.5% of the P. Therefore, composting and other methods should be considered to promote the degradation of lignin and cellulose during the return process of pruned leaves. Appropriate nitrogen application should be applied after pruned leaves to inhibit the release of N element and improve the nutrient use efficiency of pruned leaves. |
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