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Daily Patterns under the Life Cycle of a Maize Crop
Author(s) -
ANDRÉ M.,
MASSIMINO D.,
DAGUENET A.,
RICHAUD C.,
VIVOLI J.
Publication year - 1978
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1978.tb08618.x
Subject(s) - respiration , transpiration , photosynthesis , zea mays , nutrient , assimilation (phonology) , biology , absorption (acoustics) , agronomy , botany , zoology , horticulture , chemistry , ecology , linguistics , philosophy , physics , acoustics
Together with photosynthesis, transpiration and respiration, the daily uptake of NO 3 − , NH 4 + , H 2 PO 4 − , K + , Ca 2+ , Mg 2+ , SO 4 2− , the root respiration, root volume increase and root excretions have been studied by daily measurements during the growth period of whole maize plants ( Zea mays L. cv. INRA F7 × F2) raised until complete maturity on nutrient solution. The uptake patterns show a maximum absorption of NO 3 − , K + and Ca 2+ during the vegetative growth phase. The absorption of these ions declines during maturation while that of H 2 PO 4 − reaches a maximum. Root respiration and particularly the uptake of NO 3 − and K + are well correlated with the rate of root growth. Root excretion is more notable in young plants than in the old. It represents less than 0.2% of the net assimilation of adult plants.