Water deficits during reproductive growth of soybeans. I. Their effects on dry matter accumulation, seed yield and its components
Year: 1991
Type: article
Abstract: — The objective of this study was to determine the effect of water deficits during the reproductive period of an indeterminate soybean (Glycine max (L) Merr) crop on growth, seed yield and its components, and to establish whether the R 1 -R 4 or the R 4 -R 6.3 period was the most sensitive to drought.Group maturity III cultivar Asgrow 3127 was planted in the 1986—1987 and 1987-1988 growing seasons on a loamy soil (typic argiudol).The trial consisted of 3 deficiency treatments starting with 50% of soil-available water at the soil depth explored by the roots at the time of initiation, and with a control (II) constantly maintained at > 50% of soil available water.The treatment drought periods were: 0I) from R 1 to R 4 ; 10) from R 4 to R 6.3 ; and 00) from R 1 to R 4 and from R 4 to R 6.3 .Plots were individually irrigated and during the drought periods protected from rainfall with plastic covers.The control treatment (II) had greater dry matter production than 0I and 10, and these 2 treatments produced more dry matter than 00.Drought from R 1 to R 4 decreased leaf area production and drought from R 4 to R 6.3 accelerated leaf senescence.Leaf area index was related augmentation du poids des graines compense dans le rendement la réduction du nombre de gousses.déficit hydrique / Glycine max (L) Merr / production de matière sèche / rendement en graines / composantes du rendement / indice de récolte / potentiel hydrique de la feuille / indice de surface foliaire / radiation inter- ceptée
Source: Agronomie
Authors: JM Andriani, FH Andrade, EE Suero, JL Dardanelli
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2076928786