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Articles

DISCUSSION POSTERGROUP C: GROWTH PROCESSES AND MODELLING OF CROP GROWTH

Article number

174_35

Pages

283 – 284

Language

Abstract

The discussion included the most outstanding points from each poster and the lead-off talk by Prof.
H. Krug.
Problems and difficulties related to modelling of crop growth were put forward for discussion.

We have to be aware of the differences between growth models of canopies and single plants.
Working in growth chambers with single plants has a statistic advantage in that every plant can be a replica.
However, practice, plants are grown as canopies.

The response times for light and temperature are different, due to the different processes they influence.
Generally light has a short and temperature a long response time.
Temperature and light not only affect the growth rate of plants, but also have important morphological effects.
In the future, more emphasis should be laid on the morphological processes and its modelling, so it can be integrated in growth models.

Publication

Symposium Greenhouse Climate and its Control

Authors

R.W. Langhans, J.V.M. Vogelezang

Keywords

Full text

https://doi.org/10.17660/ActaHortic.1985.174.35

Online Articles (76)

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3. MICROCLIMATE, PHYSICAL PROCESSES AND GREENHOUSE TECHNOLOGY

B.J. Bailey

4. LEAF TEMPERATURE PEAKS AFTER WITHDRAWAL OF THERMAL SCREENS

Otto F. Nielsen | Marius G. Amsen

5. IMPROVED METHODS OF GREENHOUSE EVAPORATIVE COOLING

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6. THE INFLUENCE OF THERMAL SCREENING AND MOISTURE GAP ON THE TRANSPIRATION OF GLASSHOUSE TOMATOES DURING THE NIGHT.

R. de Graaf

7. LIGHT TRANSMITTANCE UNDER DIFFUSE RADIATION CIRCUMSTANCES

A.M.G. van den Kieboom | J.A. Stoffers

8. A CONTROL ALGORITHM FOR NATURAL VENTILATION BASED ON WIND TUNNEL TESTING

S. Sase | M. Nara

9. MEANS OF COOLING A GREENHOUSE IN A HOT CLIMATE

A.M. Silva | R. Rosa

10. TRANSPIRATION AND TEMPERATURE OF GREENHOUSE CROPS, IN RELATION TO INTERNAL AND EXTERNAL RESISTANCES

C. Stanghellini

11. DISCUSSION OF POSTERGROUP A: MICROCLIMATE, PHYSICAL PROCESSES AND GREENHOUSE TECHNOLOGY

M.G. Amsen | N.J. van de Braak

12. PHYSICAL MODELS AND THE GREENHOUSE CLIMATE

T. Takakura | K. Kurata | T. Honjo

13. A SIMPLE METHOD TO CALCULATE IMPROVEMENTS OF DIFFUSE LIGHT DISTRIBUTION IN DETACHED GREENHOUSE.

Marius G. Amsen

14. INFLUENCE OF THERMAL SCREEN OPTICAL PROPERTIES ON HEAT LOSSES AND MICROCLIMATE OF GREENHOUSES

A. Baille | F. Aries | M. Baille | J.C. Laury

15. DYNAMIC MODELLING OF HEAT AND MASS TRANSFER IN GREENHOUSES

J. Deltour | D. de Halleux | J. Nijskens | S. Coutisse | A. Nisen

16. SOLAR GAINS AND THERMAL REJECTS BY VENTILATION

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J. Nijskens | D. de Halleux | J. Deltour | S. Coutisse | A. Nisen

18. AN ANALYSIS OF THERMAL SCREEN EFFECTS ON GREENHOUSE ENVIRONMENT BY MEANS OF A MULTI-LAYER SCREEN MODEL

M. Okada

19. GREENHOUSE ENERGY DEMAND COMPARISONS FOR THE NETHERLANDS AND OHIO, USA

Ted H. Short | J.J.G. Breuer

20. FINITE ELEMENT ANALYSIS OF TEMPERATURES IN A BOTTOM-HEATED NURSERY CONTAINER

X. Yang | L.D. Albright

21. DISCUSSION OF POSTERGROUP B: PHYSICAL MODELS AND THE GREENHOUSE CLIMATE

K. Garzoli | F. Steinbuch

22. REPORT OF THE WORKING PARTY “CROP GROWTH MODELS”

H. Challa

23. STRATEGY FOR MODELLING PLANT GROWTH

H.-P. Liebig | E. Lederle

24. GROWTH PROCESSES AND CROP GROWTH MODELLING

H. Krug

25. THE INFLUENCE OF LIGHT QUALITY ON PLANT GROWTH IN CONTROLLED ENVIRONMENT

A. Andersen

26. GROWTH OF YOUNG CUCUMBER PLANTS UNDER DIFFERENT DIURNAL TEMPERATURE PATTERNS

H. Challa | P. Brouwer

27. SOME SPEAKING PLANT APPROACH TO THE SYNTHESIS OF CONTROL SYSTEM IN THE GREENHOUSE

Y. Hashimoto | T. Morimoto | T. Fukuyama

28. MODELING PELARGONIUM X HORTORUM BAILEY GROWTH AND MODEL RESPONSE TO ENVIRONMENTAL STRESS

D. A. Hopper | W. H. Carlson | Royal D. Heins

29. MODELING LIGHT AND TEMPERATURE EFFECTS ON CHRYSANTHEMUM MORIFOLIUM

M.G. Karlsson | R.D. Heins

30. GROWTH MODELS FOR PRODUCTION PLANNING

H. Krug

31. SIMULATION OF PLANT GROWTH BASED ON METHODS OF PLANT GROWTH ANALYSIS EXEMPLARY FOR RADISH

E. Lederle

32. EFFECTS OF ENVIRONMENTAL CONDITIONS ON GROWTH AND PRODUCTION OF CUCUMBER; COMPARISON BETWEEN EMPIRICAL AND SIMULATION DATA.

E.M. Nederhoff | A.H.C.M. Schapendonk

33. EFFECT OF AIR HUMIDITY ON GROWTH AND WATER EXCHANGE OF CUCUMBER-SEEDLINGS. PRELIMINARY REPORT.

P.A.C.M. van de Sanden

34. ENVIRONMENTAL EFFECTS ON PHOTOSYNTHESIS, SIMULATED AND EXPERIMENTAL RESULTS FROM A STUDY ON A “TOMATO-MINICROP”

A.H.C.M. Schapendonk | P. Brouwer

35. SHORT-TERM EFFECTS OF VERTICAL TEMPERATURE GRADIENTS ON THE TRANSLOCATION AND DISTRIBUTION OF ASSIMILATES.

F.N. Verkleij

36. DISCUSSION POSTERGROUP C: GROWTH PROCESSES AND MODELLING OF CROP GROWTH

R.W. Langhans | J.V.M. Vogelezang

37. GREENHOUSE CLIMATE AND CROP RESPONSE

K.E. Cockshull

38. CARBON PARTITIONING IN TOMATO LEAVES EXPOSED TO CONTINUOUS LIGHT

Fern M. Bradley | Harry W. Janes

39. CONDITIONS FOR WATER CONDENSATION ON LEAVES

M.H. Christensen | O.F. Nielsen | M.G. Amsen

40. PLANT GROWTH OPTIMISATION BY PHOTOSYNTHETIC MONITORING

R.J. Ceulemans

41. PLANT GROWTH UNDER AVERAGED DAY/NIGHT TEMPERATURES

W.B. Miller | L.D. Albright | R.W. Langhans

42. TEMPERATURE CONTROL STRATEGY TO AVOID BOLTING OF KOHLRABI WITH MINIMUM ENERGY REQUIREMENT

H.-P. Liebig

43. A STRATEGY TO CONTROL GREENHOUSE THERMAL SCREENS BASED ON THEORETICAL PLANT RESPONSES

F. Steinbuch

44. THE EFFECT OF SECONDARY GLAZING AND FIXED SCREENS ON GREENHOUSE ENVIRONMENT AND CROP RESPONSE OF TOMATOES.

N.G. Starkey

45. EFFECTS OF LIGHT INTERCEPTION AND SUPPLEMENTARY LIGHT ON THE GROWTH OF YOUNG CUCUMBER PLANTS

S.A. Tooze | D. Klapwijk

46. AIR QUALITY IN GREENHOUSES WITH AND WITHOUT CO₂ ENRICHMENT

H.G. Wolting | E.A.M. van Remortel | N. van Berkel

47. DISCUSSION OF POSTERGROUP D: GREENHOUSE CLIMATE AND CROP RESPONSE

H.-P. Liebig | S.A. Tooze

48. ADVANCES IN GREENHOUSE CLIMATE CONTROL

A.J. Udink ten Cate

49. IDEAS OF GREENHOUSE CLIMATE CONTROL BASED ON KNOWLEDGE ENGINEERING TECHNIQUES

T. Kozai

50. ANALYSIS AND SYNTHESIS OF CLIMATE CONTROL ALGORITHMS

H.-J. Tantau

51. WIND DEPENDENT CONTROL OF GREENHOUSE TEMPERATURE

B.J. Bailey

52. A CO₂ CONTROL ALGORITHM BASED ON SIMULATED PHOTOSYNTHESIS AND VENTILATION RATE

J.C. Bakker

53. A SIMPLE GREENHOUSE CLIMATE MODEL

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M.S. Giniger | C.B. Stine | G.A. Giacomelli | D.R. Mears

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A.W. Hooper | P.F. Davis

56. A GREENHOUSE CLIMATE SIMULATOR FOR TESTING GREENHOUSE COMPUTERS – PART 1: OPERATION TEST OF VENTILATION CONTROL

T. Kozai | M.J. le Mahieu | K. Kurata | T. Takakura

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K. Kurata | T. Takakura | T. Kozai | M.J. le Mahieu

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C.M. Leung | D.R. Wilson | C.J. Marquand | S.A. Tassou

59. GREENHOUSE PARAMETER ESTIMATION BY RECURSIVE LEAST SQUARES

T. Okano | L.D. Albright | J.Q. Pan | L.S. Marsh

60. THE CONTROL OF TEMPERATURE, HUMIDITY AND CARBON DIOXIDE CONCENTRATION IN EXPERIMENTAL GLASSHOUSES

R.A. Saffell

61. GREENHOUSE CLIMATE CONTROL USING MATHEMATICAL MODELS

H.-J. Tantau

62. MODELLING AND SIMULATION IN GREENHOUSE CLIMATE CONTROL

A.J. Udink ten Cate

63. MEASUREMENT AND CONTROL OF THE CLIMATE IN A GREENHOUSE, WHERE A HEATED CONCRETE-FLOOR IS USED AS LOW TEMPERATURE ENERGY SOURCE

P.W.T. Verwaaijen | Th.H. Gieling | W.Th.M. van Meurs

64. NETWORK SIMULATION MODELING OF GREENHOUSE CLIMATE AND CONTROL

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65. DISCUSSION OF POSTERGROUP E: ANALYSIS AND SYNTHESIS OF CLIMATE CONTROL ALGORITHMS

T. Kozai | M.J. le Mahieu

66. COMPUTER CONTROL EQUIPMENT AND MEASURING DEVICES

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67. APPLICATION OF NMR TO WATER FLOW AND -BALANCE IN PLANTS

H. van As | T.J. Schaafsma | J. Blaakmeer

68. DEVELOPMENT OF A MICROCOMPUTER INTERFACE TO MICROPROCESSOR BASED GREENHOUSE ENVIRONMENT CONTROLLERS

John L. Ditner | Scott C. Lindsay | E. Brundrett | Tom J. Jewett

69. OPTIMIZATION THE GREENHOUSE CLIMATE INVOLVES MORE THAN ADAPTING PROGRAMMES

P.H.M. Goeijenbier | A.J. Zandbelt

70. A SYSTEM FOR GREENHOUSE CLIMATE CONTROL USING HP EQUIPMENT

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71. COMPONENT HARDWARE AND SOLAR HEATING SOFTWARE FOR A SECOND GENERATION GREENHOUSE COMPUTER

G.J. Monk | J.M. Molnar | E.M. van Zinderen Bakker | A. MacKenzie

72. CLIMATIC AND ENVIRONMENTAL DATA MONITORING IN GREENHOUSES HEATED WITH GEOTHERMAL WATER

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73. HEAT-PULSE SAP FLOW METER

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74. A MULTILEVEL CONTROL SYSTEM FOR GREENHOUSE CULTIVATION

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75. MODELLING AND CONTROL FOR NEW ZEALAND GREENHOUSES

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76. DISCUSSION OF POSTERGROUP F: COMPUTER CONTROL EQUIPMENT AND MEASURING DEVICES

D.R. Mears | M.J. le Mahieu