林草复合经营模式养分动态关系
文献类型：期刊论文
| 作者 | 王海明
|
| 刊名 | 山地学报
 |
| 出版日期 | 2006 |
| 卷号 | 24期号:2页码:156-160 |
| 关键词 | 林草生态系统 营养元素 退耕还林 |
| 其他题名 | Nutrient Content Cycle of Different Forest and Grass System |
| 通讯作者 | 王海明 |
| 合作状况 | 其它 |
| 中文摘要 | 林草复合经营模式在目前的退耕还林工程中起着重要的作用，研究林草复合模式的林与草之间的营养元素关系，通过对不同林草养分的研究得出林木、草、土壤之间的养分动态关系，对矿质养分相互关系的研究为合理搭配林草提供重要依据，为退化山地生态系统的恢复和重建提供重要的模式。模式Ⅰ在退耕还林初期，土壤养分供给氮素虽未亏缺，但从三者问的消长关系看出：氮磷素供应并不富足，特别是水解性氮。土壤交换性钙供应不足，引起杉木与黑麦草对钙质竞争。而土壤全钙含量很高，钙质向交换性钙转化的速度缓慢。模式Ⅱ与模式Ⅰ得到相似结果，所以在这两种模式中应加强人为管理，在退耕初期应适当增施氮磷钙肥，辅以土壤结构改良，加速土壤养分向植物可利用态转化。模式Ⅲ牛鞭草的生物量极高，磷、钙索相对缺乏。由于牛鞭草被不断的采割用于牲畜的饲料，对该模式中必须进行一定养分的输入，以保持杂交竹与牛鞭草这一林草生态系统的养分平衡。 |
| 英文摘要 | Forest and grass ecosystem plays a very important role in converting agicultural lands to forest．This paper makes a preliminary study on biomass and its distribution and neighborhood interference between forest and grassland and dynamics of nutrient elements about three diferent forest-grassland Pattern around the Sichuan Basin．In order to know about essence of forest and grassland ecosystem and provided theory for forest mixed with grassland． The result shows that： I e function of plant absorption influences severely the soil available N． nle variety of N content of tomen— tosa and L multifl~rum is the salne．The N content increases when their growth is flourishing．The soil N can almost supply them in this time．In the Pattern nl，the soil available N increase from beginto end．There is the same trend of total N in the leaves of B．pervariabilis x D．amopsis validus and Hemarthria． The content of available K declines while the available K in plant increases in the earlier growing phase．However， the available K in plan t declines when the growth of plant stops．Compared to the K in the leaves of C．1anceolatta， the density of K in herb is higher and changes greater．Following the aging of leaves，the density of K graduaHy decline．In Pattern III，the changing~ends of available K and total K are similar．The density of K in the leaves of vegetables increases at the earlier growth season but later decreases．The K variety in the leaves of B．pervariabilis D．amopsis validus doesn’t parallel with that of厶multiflorum．Following the absorption of available K． the available K is beginning to decline and the ebb and flow comes into being．In Pattern I，Ca content of C．1an— ceolatta and L．multifl~rum is dropping，and on July Ca content of L．multiflorum go on dropping，instead，but Ca content of C．1anceolatta rises．Ca content of herbs is dropping． |
| 分类号 | S750;S54 |
| 资助信息 | 国家科技部西部专项"四川省退耕还林科技示范工程"~~ |
| 语种 | 中文 |
| 公开日期 | 2010-08-16 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/1426]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山区发展研究中心 |
| 推荐引用方式 GB/T 7714 | 王海明. 林草复合经营模式养分动态关系[J]. 山地学报,2006,24(2):156-160. |
| APA | 王海明.(2006).林草复合经营模式养分动态关系.山地学报,24(2),156-160. |
| MLA | 王海明."林草复合经营模式养分动态关系".山地学报 24.2(2006):156-160. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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