...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Acta Horticulturae >Two instead of three leaves between tomato trusses: measured and simulated effects on partitioning and yield.
【24h】

Two instead of three leaves between tomato trusses: measured and simulated effects on partitioning and yield.

机译：番茄桁架之间只有两片叶子，而不是三片叶子：对分配和产量的实测和模拟效果。

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

Commercial tomato cultivars initiate three leaves between trusses. It is expected that in a cultivar with only two leaves between trusses assimilate partitioning towards the fruits and therefore yield would be favoured. However, a lower number of leaves on the plant reduces leaf area index (LAI) and may therefore reduce light interception and total biomass production, affecting yield negatively. The effect of the number of leaves between trusses was investigated in a simulation study and a greenhouse experiment. In the photosynthesis-driven model TOMSIM, two leaves per truss were simulated by reducing the sink strength of each vegetative unit by 1/3. Seven fruits per truss were assumed. Reduced vegetative sink strength increased partitioning to the fruits over a whole season from 66 to 74%. However, yield increased only marginally (1.5%), as average LAI decreased from 2.4 to 1.7 m2 m-2 and hence total biomass production was reduced by 9.5%. To avoid this reduction in total biomass production, the removal of old leaves was delayed by 2 weeks. This resulted in an average LAI of 2.3 m2 m-2, identical total biomass production, and yield improved compared to the control with 12.8%. In the greenhouse experiment, control plants (no leaf pruning) and plants where the second leaf of each vegetative unit was weekly removed when it was only 1-3 cm long, were grown. To compensate for a decrease in LAI, pruned plants were also grown at 3.8 plants m-2. All plants were pruned to 6 fruits per truss. Leaf pruning increased partitioning to the fruits, averaged over the period from 18 February to 20 May, from 57 to 61%. Average LAI was 2.9, 2.4 and 3.6 m2 m-2 for control, leaf pruning and leaf pruning and increased density, respectively. Leaf pruning significantly reduced total biomass by 11% whereas fruit yield was hardly affected. Leaf pruning and increased density unexpectedly resulted in only 58% of dry matter allocated to the fruits. Increasing density increased biomass and fruit yield per m2 by 29 and 17%, respectively. It is concluded, based on simulation results and experimental data, that a tomato cultivar with 2 instead of 3 leaves between trusses would improve yield, when combined with measures to keep LAI sufficiently high.
机译：商业番茄栽培品种在桁架之间萌生了三片叶子。可以预期，在仅有两个桁架之间的叶子的品种中，同化向果实分配，因此将有利于产量。但是，植物上较少的叶片会减少叶面积指数（LAI），因此可能会减少光的拦截和总生物量的产生，从而对产量产生负面影响。在模拟研究和温室实验中研究了桁架之间的叶片数量的影响。在光合作用驱动的模型TOMSIM中，通过将每个营养单元的下沉强度降低1/3，可以模拟每个桁架的两片叶子。假定每个桁架有七个水果。营养池强度的降低使整个季节对水果的分配从66％增加到74％。然而，由于平均LAI从2.4降至1.7 m2 m-2，单产仅略有提高（1.5％），因此总生物量产量减少了9.5％。为避免生物量总产量的减少，将旧叶的去除推迟了2周。这导致平均LAI为2.3 m2 m-2，总生物量产量相同，与对照相比，产量提高了12.8％。在温室试验中，生长了对照植物（无叶修剪）和每个植物单位的第二片叶子（只有1-3厘米长）被每周去除的植物。为了补偿LAI的减少，修剪的植物也以3.8植物m-2生长。将所有植物修剪成每个桁架6个果实。从2月18日至5月20日，叶片修剪增加了对果实的分配，从57％增至61％。控制，叶片修剪和叶片修剪以及增加密度的平均LAI分别为2.9、2.4和3.6 m2 m-2。修剪叶片可将总生物量显着降低11％，而水果产量几乎没有受到影响。叶片修剪和密度增加出乎意料地导致仅58％的干物质分配给果实。密度的增加使每平方米的生物量和水果产量分别增加29％和17％。根据模拟结果和实验数据得出的结论是，与保持LAI足够高的措施相结合，在桁架之间使用2片叶子而不是3片叶子的番茄品种将提高产量。

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