• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Phenology, canopy aging and seasonal carbon balance as related to delayed winter pruning of vitis vinifera L. cv. sangiovese grapevines
【2h】

Phenology, canopy aging and seasonal carbon balance as related to delayed winter pruning of vitis vinifera L. cv. sangiovese grapevines

机译：与葡萄越冬修剪推迟有关的物候，冠层老化和季节性碳平衡。桑娇维塞葡萄藤

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Manipulating or shifting annual grapevine growing cycle to offset limitations imposed by global warming is a must today, and delayed winter pruning is a tool to achieve it. However, no information is available about its physiological background, especially in relation to modifications in canopy phenology, demography and seasonal carbon budget. Mechanistic hypothesis underlying this work was that very late winter pruning (LWP) can achieve significant postponement of phenological stages so that ripening might occur in a cooler period and, concurrently, ripening potential can be improved due to higher efficiency and prolonged longevity of the canopy. Variability in the dynamics of the annual cycle was created in mature potted cv. Sangiovese grapevines subjected to either standard winter pruning (SWP) or late and very late winter pruning (LWP, VLWP) performed when apical shoots on the unpruned canes were at the stage of 2 and 7 unfolded leaves. Vegetative growth, phenology and canopy net CO2 exchange (NCER) were followed throughout the season. Despite LWP and VLWP induced a bud-burst delay of 17 and 31 days vs. SWP, the delay was fully offset at harvest for LWP and was reduced to 6 days in VLWP. LWP showed notably higher canopy efficiency as shorter time needed to reach maximum NCER/leaf area (22 days vs. 34 in SWP), highest maximum NCER/leaf area (+37% as compared to SWP) and higher NCER/leaf area rates from veraison to end of season. As a result, seasonal cumulated carbon in LWP was 17% higher than SWP. A negative functional relationship was also established between amount of leaf area removed at winter pruning and yield per vine and berry number per cluster. Although retarded winter pruning was not able to postpone late-season phenological stages under the warm conditions of this study, it showed a remarkable potential to limit yield while improving grape quality, thereby fostering the hypothesis that it could be used to replace time-consuming and costly cluster thinning. This preliminary study indicates that proper winter pruning date should be timed so as not to exceed the stage of two unfolded leaves.
机译：今天，必须调整或改变葡萄树的年度生长周期，以抵消全球变暖带来的局限，而推迟冬季修剪是实现这一目标的工具。但是，尚无有关其生理背景的信息，尤其是有关冠层物候，人口统计学和季节性碳收支变化的信息。这项工作的机械学说是，很晚的冬季修剪（LWP）可以显着推迟物候期，因此成熟期可以在较冷的时期发生，同时，由于较高的冠层效率和较长的寿命，可以提高成熟潜力。在成熟的盆栽简历中创造了年度周期动态的可变性。当未修剪的甘蔗上的顶端芽分别在2和7片展开的阶段时，对桑娇维塞葡萄进行标准的冬季修剪（SWP）或后期和很晚的冬季修剪（LWP，VLWP）。在整个季节中都跟踪了植物生长，物候和冠层净二氧化碳交换量（NCER）。尽管LWP和VLWP与SWP相比萌芽延迟分别延迟了17天和31天，但LWP的收获延迟被抵消，而VLWP则减少至6天。 LWP的冠层效率显着提高，因为达到最大NCER /叶面积所需的时间更短（22天，而SWP为34天），最高NCER /叶面积最高（比SWP高37％）和更高的NCER /叶面积率验证到赛季结束。结果，LWP中的季节性积碳比SWP高17％。在冬季修剪时除去的叶面积量与每簇的每株葡萄和浆果数之间也建立了负的功能关系。尽管在本研究的温暖条件下，冬季修剪的迟缓无法推迟后期的物候期，但它显示了在提高葡萄品质的同时限制产量的显着潜力，从而树立了可以用来代替耗时且费力的假设。代价高昂的群集精简。这项初步研究表明，应适当修剪冬季修剪日期，以免超过两张未展开的叶子的阶段。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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