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Effect of Day and Night Temperature Difference on Dry Matter Allocation of Tomato in Fruit Stage and Its Simulation Models(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年05
Page:
20-26
Research Field:
Publishing date:

Info

Title:
Effect of Day and Night Temperature Difference on Dry Matter Allocation of Tomato in Fruit Stage and Its Simulation Models
Author(s):
YUAN Xiaokang; LIU Fulai
(Hunan Research Institute of Meteorological Science，Changsha，Hunan 410118)
Keywords:
day and night temperature difference; tomato; dry matter allocation; influence; simulation
PACS:
-
DOI:
10.11937/bfyy.201705005
Abstract:
In order to study the effect of day and night temperature difference (DIF) on dry matter allocation of tomato in fruit stage，three experiments were conducted in climate chambers.Five day/night temperature regimes 16/34，19/31，25/25，31/19 and 34/16 ℃ with respective DIF of -18,-12，0，+12 and +18 at a common 25 ℃ mean daily temperature were used.The results showed that DIF influenced dry matter allocation.Compared with 0 ℃ DIF，dry matter partitioning index of root (Rroot) and dry matter partitioning index of leaf (Rleaf) decreased while dry matter partitioning index of stem (Rstem) and dry matter partitioning index of fruit (Rfruit) increased 〖JP4〗under +12 ℃ DIF.However，Rroot and Rleaf increased while Rstem and Rfruit decreased under negative DIF.Under +18 ℃ DIF，Rleaf increased while Rfruit decreased.Rroot，Rstem and Rleaf decreased with product of thermal effectiveness and PAR(TEP) exponentially，while Rfruit increased with TEP in Logistic model.By fitting the numerical relationship between DIF value and exponential model parameters，simulation models of Rroot，Rstem and Rleaf were established.By fitting the numerical relationship between DIF value and Logistic model parameters，simulation model of Rfruit was established.They were tested by independent data and showed good effect.

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Last Update: 2017-03-24