...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Horticulturae >Water table level effect on the water balance and yield of two pear rootstock.
【24h】

Water table level effect on the water balance and yield of two pear rootstock.

机译：地下水位对两种梨砧木水分平衡和产量的影响。

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

A trial was conducted during 1994-2002 in Po Valley, northern Italy to evaluate the effect of shallow and deep water tables on pear (cultivars Conference and Williams) tree yield and growth indexes in relation to rootstock and cultivar and to estimate the potential contribution of the capillary rising from the water table to the water balance. Conference grafted on Quince-C and self-rooted and Williams, which is self-rooted, were planted on an experimental field with a slope of 1.6% and an artificial water table (WT) maintained at a depth of 90 and 250 cm in the bottom and upper parts of the field, respectively. Fruit quality was not correlated with water table depth nor was the trunk circumference, canopy volume or weight of pruning wood. The growth ratio of the canopy decreased starting from 190 cm WT for Conference/Quince-C, 240 cm WT for self-rooted Conference, while no effect was observed on self-rooted Williams. The marketable yield showed a strong negative correlation with shallow and deep water tables. The curve inflexion point corresponds to a water table depth of 155 cm. In general, the yield decreased faster with decreases in WT (water excess) than with WT increases, eventhough the yield reduction caused by water deficiency resulted higher. Conference/Quince-C showed a yield reduction of 20% compared to the maximum observed yield in the case of water excess and 72% in the case of deficiency. The reduction was respectively 16 and 40% for self-rooted Conference and not relevant for self-rooted Williams. The water table contribution to the water balance was often more than the daily ETc with WT <120 cm; the WT contribution decreased rapidly at depths exceeding 150-160 cm.
机译：1994年至2002年，在意大利北部的Po Valley进行了一项试验，以评估浅水位和深水位对与砧木和栽培品种有关的梨（品种会议和Williams）树的产量和生长指数的影响，并估算毛细管从地下水位上升到水平衡。在Quince-C上嫁接的会议和自生根的以及自生根的Williams被种植在实验场上，坡度为1.6％，人工水位（WT）保持在90和250 cm的深度字段的底部和上部。果实质​​量与地下水位深度，树干周长，冠层体积或修剪木材的重量都不相关。顶盖的生长率从Conference / Quince-C的190 cm WT开始，自根的Conference的240 cm WT开始减小，而自根的Williams则未观察到影响。可出售的收益与浅水位和深水位显示出强烈的负相关性。弯曲拐点对应于水深155厘米。通常，尽管水分缺乏导致产量下降，但WT降低（水过量）的产量下降速度要比WT升高的速度快。 Conference / Quince-C在水过多的情况下显示出与最大观察产量相比降低了20％，在水缺乏的情况下则达到了72％。自发会议的减少分别为16％和40％，与自发威廉姆斯无关。地下水位对水平衡的贡献通常大于WT <120 cm的每日ETc。在超过150-160 cm的深度，WT的贡献迅速下降。

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