• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Effect of Photosynthesis, Vegetative Growth and Productivity of Plum Trees('Prunus salicina', cv. 'Casselman') in the San Joaquin Valley of California
【24h】

Effect of Photosynthesis, Vegetative Growth and Productivity of Plum Trees('Prunus salicina', cv. 'Casselman') in the San Joaquin Valley of California

机译：加州圣华金河谷梅树（'prunus salicina'，cv。'Casselman'）光合作用，营养生长和生产力的影响

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

摘要

Plum trees (Prunus salicina 'Casselman') were exposed to ozone in open-topchambers in 1989-1992. The ozone treatments were charcoal-filtered air, ambient air, and ambient air + ozone. Mean 12-h ozone concentrations were approx. 0.030, approx. 0.050, and approx. 0.090 ppm, respectivity, in 1991-1992. No-chamber plots were utilized to assess chamber effects. This report describes results obtained in 1991-1993. Net photosynthesis in leaves decreased ozone concentration. Trees grown in ambient air + ozone generally had greater early season leaf-fall than those in the other treatments. Fruit number per tree decreased with increasing ozone concentration, which significantly reduced fruit yield. The carryover effect of the previous year's ozone environment on fruit yield was examined in 1993 (i.e., post-chamber study). In the post-chamber study, trees previously exposed to ozone in open-top chambers from 1989-1992 were grown in no-chamber plots in 1993, and yields measured at the end of the growing season. Yields (16-18 kg tree-1) were similar in trees previously exposed to charcoal-filtered air, ambient air, or ambient air + ozone. The results indicate that ozone concentrations in the current year can affect the yield of 'Casselman' plum trees, possibly by affecting fruit abscission after fruit set.

著录项

相似文献

  • 外文文献
  • 中文文献
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