...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Horticulturae >Progress in the development of Partial Rootzone Drying of apple trees.
【24h】

Progress in the development of Partial Rootzone Drying of apple trees.

机译：苹果部分根区干燥的研究进展。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Field experiments were conducted during 2001 and 2002 in 4 commercial orchards in Washington (2) and Colorado (2), USA, to evaluate partial root zone drying (PRD) on apples (cultivars Gala and Fuji). Irrigation systems included microsprinklers, surface and subsurface drip lines. At each site, a PRD50 regime was compared to a well-watered control and a season-long deficit regime (DI50). Both, PRD50 and DI50 were irrigated at 50% volume of the control. In contrast to PRD50 where only half the root zone was watered, the DI50 and control treatments were irrigated over the full rootzone. At the Colorado sites, two further PRD treatments received 25 or 75% volume of the control on 25 or 75% of the surface area (PRD25 and PRD75, respectively). Seasonal potential evapotranspiration exceeded 1000 mm and precipitation was <130 mm in both years at all sites. Seasonal irrigation inputs ranged from 205 mm for PRD25 with drip irrigated Gala to 765 mm for the control with microsprinklers on Fuji. There were no significant treatment effects on yield, fruit size and fruit quality at harvest and after cold storage in Gala in either year. With Fuji, no significant effects on yield and fruit quality were found in the first year, but mean fruit size was reduced by PRD50 at one site. In the second season, DI50 tended to reduce fruit size at both sites, and yield was significantly lower at one site. At one site, PRD50 and DI50 fruits were firmer and had higher concentration of soluble solids at harvest and after storage at room temperature for 7 days. Fruit disorders (sunburn, russet, watercore) have not been affected by treatments. Results indicate that PRD and DI50 allow large water savings with minor or no impacts on fruit size and yield while potentially improving fruit quality. Seasonal crop coefficients for apple might be reduced to 0.3 or less with new or modified irrigation techniques.
机译：在2001年至2002年期间，在美国华盛顿（2）和科罗拉多（2）的4个商业果园中进行了田间试验，以评估苹果（品种Gala和Fuji）的部分根区干燥（PRD）。灌溉系统包括微喷头，地面和地下滴灌线。在每个站点，将PRD50方案与灌溉良好的对照和整个季节的赤字方案（DI50）进行比较。 PRD50和DI50均以对照的50％体积灌溉。与PRD50相比，只有一半的根部区域被浇水，而DI50和对照处理则在整个根部区域灌溉。在科罗拉多州的站点，另外两种PRD处理在25％或75％的表面积（分别为PRD25和PRD75）上接受了25％或75％的对照。在所有地点，两年的季节性潜在蒸散量均超过1000毫米，降水量小于130毫米。季节性灌溉输入范围从PRD25的205毫米（带滴灌节庆型）到765毫米的富士微喷头控制范围。在任何一年中，联欢晚会的收成和冷藏后，对产量，果实大小和果实品质都没有明显的处理效果。使用富士，第一年未发现对产量和果实品质有显着影响，但在一个地点，平均果实大小减少了PRD50。在第二季，DI50趋于减少两个地点的果实大小，并且一个地点的产量显着降低。在一个地点，PRD50和DI50果实更坚固，收获时和在室温下存放7天后可溶性固形物的浓度更高。水果疾病（晒伤，赤褐色，水核）未受到治疗的影响。结果表明，PRD和DI50可以节省大量的水，而对果实的大小和产量影响很小或没有影响，同时可能改善果实的品质。使用新的或改良的灌溉技术，苹果的季节性作物系数可能降低到0.3或更小。

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