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2015 ; 15
(3
): 102-112
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Ecophysiological characteristics of five weeds and a wheat crop in the
Indo-Gangetic Plains, India
#MMPMID32834774
Singh V
; Gupta S
; Singh H
; Raghubanshi AS
Weed Biol Manag
2015[Sep]; 15
(3
): 102-112
PMID32834774
show ga
The objective of this research was to compare selected ecophysiological
parameters for a wheat crop found in the Indo-Gangetic Plains of India and its
five dominant weeds. The dominant and regionally ubiquitous weeds in the wheat
field that was selected for the study were Anagallis arvensis, Chenopodium album,
Melilotus albus, Phalaris minor and Rumex dentatus. Taller weeds, such as
C.?album and P.?minor, constituted one group along with the crop, with a low
photosynthetic rate, specific leaf area, leaf nitrogen mass basis, chlorophyll
content, photosynthetic nitrogen-use efficiency and leaf area ratio, in
comparison to shorter weeds, such as A.?arvensis, M.?albus and R.?dentatus, which
formed another group with a high photosynthetic rate, specific leaf area, leaf
nitrogen mass basis, chlorophyll content, photosynthetic nitrogen-use efficiency
and leaf area ratio. Interspecific variations in the photosynthetic rate were
driven mainly by variability in the specific leaf area and leaf nitrogen content.
The taller weeds and the crop had a low specific leaf area later in the season,
whereas the smaller weeds had a relatively high specific leaf area, which might
be an adaptation to the shaded environment below the canopy. The result indicates
that any weed management in the wheat fields of the Indo-Gangetic Plains will
need two different approaches because of the different strategies followed by the
two weed groups that were identified in the present study.