...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Agroforestry Systems >Tree row spacing affected agronomic and economic performance of Eucalyptus-based agroforestry in Andhra Pradesh, Southern India
【24h】

Tree row spacing affected agronomic and economic performance of Eucalyptus-based agroforestry in Andhra Pradesh, Southern India

机译：行距影响印度南部安得拉邦以桉树为基础的农林业的农艺和经济表现

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The 3 c 2 m spacing currently used for eucalyptus plantations in the state of Andhra Pradesh, southern India does not permit intercropping from the second year. This discourages small landholders who need regular income from taking up eucalyptus plantations and benefiting from the expanding market for pulpwood. Therefore, on-farm experiments were conducted near Bhadrachalam, Khammam district (Andhra Pradesh) for over 4 years from August 2001 to November 2005 to examine whether wide-row planting and grouping of certain tree rows will facilitate extended intercropping without sacrificing wood yield. Eucalyptus planted in five-spatial arrangements in agroforestry [3 c 2 m (farmers' practice), 6 c 1 m, 7 c 1.5 m paired rows (7 c 1.5 PR), 11 c 1 m paired rows (11 c 1 PR) and 10 c 1.5 m triple rows (10 c 1.5 TR)] was compared with sole tree stands at a constant density of 1,666 trees hap#. Cowpea (Vigna unguiculata) was intercropped during the post-rainy seasons from 2001 to 2004, and fodder grasses (Panicum maximum and Brachiaria ruziziensis) were intercropped during both the seasons of 2005. At 51 months after planting, different spatial arrangements did not significantly affect height and diameter at breast height (dbh). Total dry biomass of eucalyptus in different spatial arrangements ranged between 59.5 and 52.9 Mg hap#, the highest being with 6 c 1 m and the lowest with 10 c 1.5 TR, but treatment differences were not significant. The widely spaced paired row (11 c 1 PR) and triple row (10 c 1.5 TR) arrangements produced 62-73% of sole cowpea yield in 2003, 59-66% of sole cowpea yield in 2004, and 79-94% of sole fodder in 2005. In contrast, the 3 c 2 m spacing allowed only 17-45% of sole crop yields in these years. The better performance of intercrops in widely spaced eucalyptus was likely because of limited competition from trees for light and water. Intercropping of eucalyptus in these wider rows gave 14% greater net returns compared with intercropping in eucalyptus spaced at 3 c 2 m, 19% greater returns compared with that from sole tree woodlot and 263% greater returns compared with that from sole crops. Therefore, in regions where annual rainfall is around 1,000 mm and soils are fairly good, eucalyptus at a density of 1,666 plants per ha can be planted in uniformly spaced wide-rows (6 m) or paired rows at an inter-pair spacing of 7-11 m for improving intercrop performance without sacrificing wood production.
机译：印度南部安得拉邦目前用于桉树种植的3 c 2 m间距不允许从第二年开始进行间作。这使需要固定收入的小土地所有者不愿使用桉树种植园，并从纸浆市场的扩大中受益。因此，从2001年8月至2005年11月，在Khammam区（安得拉邦）的Bhadrachalam附近进行了为期4年的农场试验，以研究在某些树木行上进行大行种植和分组是否有利于扩大间作而不影响木材产量。在五农林中种植桉树[3 c 2 m（农民的作法），6 c 1 m，7 c 1.5 m成对的行（7 c 1.5 PR），11 c 1 m成对的行（11 c 1 PR）将10 c 1.5 m三行（10 c 1.5 TR）]与单一树架进行比较，恒定密度为1,666棵树。 2001豆（Vigna unguiculata）在2001年至2004年的雨后季节间作套种，而饲料草（Panicum maximum和Brachiaria ruziziensis）则在2005年两个季节间作套种。在种植后的51个月，不同的空间布局并未明显影响胸部高度的高度和直径（dbh）。不同空间布局的桉树总干生物量在59.5至52.9 Mg hap＃之间，最高为6 c 1 m，最低为10 c 1.5 TR，但处理差异不显着。间隔较宽的成对排（11 c 1 PR）和三排（10 c 1.5 TR）安排在2003年产生了62-73％的唯一cow豆产量，在2004年产生了59-6％的唯一of豆产量，以及79-94％ 2005年是唯一的饲料。相比之下，3 c 2 m的间距仅允许这些年来唯一作物产量的17-45％。间作在宽间隔的桉树中表现更好，可能是由于树木争夺光和水的竞争有限。与间距为3 c 2 m的桉树间作相比，这些较宽的行间作的桉树间作的净收益高出14％，比单一树种林地的收益高出19％，比单一作物的收益高263％。因此，在年降雨量约为1000毫米且土壤条件良好的地区，可以将每公顷1,666株密度的桉树种植在等距的宽行（6 m）或成对行中，成对行距为7 -11 m，用于在不影响木材产量的情况下改善间作性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号