| 不同植茶年限土壤团聚体碳氮磷生态化学计量学特征 |
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| 引用本文： | 郭保卫,朱聪聪,朱大伟,张洪程,江峰,葛梦婕.不同植茶年限土壤团聚体碳氮磷生态化学计量学特征[J].生态学杂志,2015,34(1):9-16. |
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| 作者姓名： | 郭保卫 朱聪聪 朱大伟 张洪程 江峰 葛梦婕 |
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| 作者单位： | (四川农业大学资源环境学院, 成都 611130) |
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| 基金项目： | 国家粮食丰产科技工程项目(2011BAD16B03);江苏省农机三新工程项目(NJ2012-28);江苏省农业科技自主创新基金项目(CX[12]1003.9)资助 |
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| 摘 要： | 试验选取了四川雅安12～15年、20～22年、30～33年和>50年的茶园,研究其土壤团聚体有机碳、全氮、全磷的含量分布及其生态化学计量学特征,以阐明不同植茶年限土壤团聚体碳氮磷生态化学计量学特征的指示意义.结果表明: 0～20 cm和20～40 cm土层土壤有机碳、全氮和全磷含量的变异系数分别为17.5%、16.3%、9.4%和24.0%、21.0%、9.2%;全磷的空间变异性低于有机碳和全氮,但三者呈极显著的正相关关系.有机碳与全氮含量集中分布于小粒径团聚体中,且均在植茶50年后达到最大值,土壤全磷在各粒径团聚体中分布则较为均匀,在种植年限上的变化也不大;0～20 cm和20～40 cm土层土壤C/N、C/P和N/P的变异系数分别为9.4%、14.0%、14.8%和7.4%、24.9%、21.8%;土壤C/N的变异性较低,土壤C/P和N/P均在小粒径中较高,且在植茶50年后达到最大值. 土壤C/N、C/P和N/P对土壤有机碳储量具有良好的指示作用.
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| 关 键 词： | 植茶年限 土壤团聚体 碳、氮、磷 生态化学计量学 |
Effects of planting density on plant form and micrometeorology in different types of rice with potted seedlings by mechanical-transplanting method |
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| GUO Bao-wei;ZHU Cong-cong;ZHU Da-wei;ZHANG Hong-cheng;JIANG Feng;GE Meng-jie.Effects of planting density on plant form and micrometeorology in different types of rice with potted seedlings by mechanical-transplanting method[J].Chinese Journal of Ecology,2015,34(1):9-16. |
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| Authors: | GUO Bao-wei;ZHU Cong-cong;ZHU Da-wei;ZHANG Hong-cheng;JIANG Feng;GE Meng-jie |
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| Affiliation: | (College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China) |
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| Abstract: | This study selected 4 tea plantations with different ages (12-15, 20-22, 30-33 and >50 year old) located in Ya’an, Sichuan Province, China to investigate the distribution patterns of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP), and to examine the ecological stoichiometric characteristics of C, N and P within soil aggregates. The results showed that the coefficients of variation of SOC, TN and TP were 17.5%, 16.3% and 9.4%, respectively in the 0-20 cm soil layer and were 24.0%, 21.0% and 9.2%, respectively in the 20-40 cm soil layer. The spatial variation of TP was lower than that of SOC and TN but there were significant positive correlations among them. SOC and TN were distributed in the small size aggregates and both of them had the greatest values in the >50 year old tea plantation, however, the distribution of TP was relatively uniform among aggregates and ages. The coefficients of variation of C/N, C/P, and N/P were 9.4%, 14.0% and 14.9%, respectively in the 0-20 cm soil layer and were 7.4%, 24.9% and 21.8%, respectively in the 20-40 cm soil layer. Variation of C/N was lower than that of C/P and N/P. Averaged C/P and N/P values in the small size aggregates were higher than in aggregates of other sizes, and the maximum values were in the >50 year old plantation. C/N, C/P and N/P had good indication for soil organic carbon storage. |
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| Keywords: | rice potted seedling mechanical transplanting plant form micrometeorology |
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