Effects of Plant Population Density on Yield and Yield Components of Eight Isolines of cv. Clark (Glycine max L.)
Publish Year: 1380
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JASTMO-3-2_004
تاریخ نمایه سازی: 22 آبان 1402
Abstract:
A field study was conducted to evaluate the agronomic response of eight isolines of cv.
Clark on a clay loam soil (at Karaj-Iran, ۳۵۰۴۸´) to four plant population densities of ۱۱.۳,
۱۸.۵, ۶۸.۵, and ۱۰۳.۴ plants per square metre. Significant yield increase was obtained as a
result of higher plant density. Differences among the cv. Clark isolines were significant
(p<۰.۰۵). Yield components such as numbers of branches, pods, and seeds per plant decreased
linearly as population density increased. Adjustments in pods and seeds per plant
resulted from altered branches per plant. The isolines which exhibit profuse branching
(e.g. E۱E۲E۳, E۱e۲E۳, E۱E۲ e۳) were capable of optimising yield when planted at low densities.
The second dynamic factor that aided yield compensation by plant population density
was greater total dry matter partitioning, which resulted in a significantly greater harvest
index at the lower compared with the higher plant density. The results indicated that total
biomass and crop growth rate were the major elements explaining the reduced yield compensation
factors at higher plant population density. Plotting the fitted seed yield values
against the number of dominant alleles showed the effect of the maturity genes on the response
of seed yield to plant density.
Keywords:
Authors
N. Majnoun Hosseini
Department of Agronomy, College of Agriculture, The University of Tehran, Islamic Republic of Iran.
R. H. Ellis
Department of Agriculture, The University of Reading, Earley Gate, P.O.Box: ۲۳۶, Reading, RG۶ ۶AT, UK.
B. Yazdi-Samadi
Department of Agronomy, College of Agriculture, The University of Tehran, Islamic Republic of Iran.