Genotypic Differences in Dry Bean Yield and Yield Components as Influenced by Nitrogen Fertilization and Rhizobia

Simulation models are important tools for the analysis of cultivated systems to estimate the performance of crops in different environments. The CROPGRO- model (DSSAT) was calibrated and validated using Carioca bean (Phaseolus vulgaris L.) to estimate yield and the development of the crop, sown in three row spacings (0.4, 0.5, and 0.6 m) and two fertilization rates (300 and 500 kg ha-1 of 4-30-16 N-P-K), in Santo Antônio de Goiás, GO, Brazil. To calibrate the model a combination of the genetic coefficients that characterize the phenology and morphology of the dry bean crop was used to obtain the best possible fit between predicted and observed anthesis and physiological maturity dates, leaf area index (LAI), total dry matter (TDM), yield components, and grain yield for the 0.6 m row spacing. To test the model the experimental records of the 0.4 and 0.5 m row spacings were used. In both, calibration and test, the performance of the model was evaluated plotting observed and predicted values of LAI and TDM versus time, using the r², and the agreement index (d) as statistical criteria. In relation to yield and yield components the percent difference between the observed and predicted data was calculated. The model appeared to be adequate to simulate phenology, grain yield and yield components for the Carioca bean cultivar, related to different levels of fertilization and row spacing, either during calibration or the testing phase. During the test, the grain yield was overestimated by less than 15.4%, indicating a potential use for the calibrated model in assessing climatic risks in this region.

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Row Spacing, Plant Population, and Genotype × Row Spacing Interaction Effects on Yield and Yield Components of Dry Bean

Agronomy Journal ◽

10.2134/agronj1988.00021962008000040017x ◽

1988 ◽

Vol 80 (4) ◽

pp. 631-634 ◽

Cited By ~ 22

Author(s):

K. F. Grafton ◽

A. A. Schneiter ◽

B. J. Nagle

Keyword(s):

Yield Components ◽

Interaction Effects ◽

Plant Population ◽

Row Spacing ◽

Dry Bean ◽

Yield And Yield Components

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Response of irrigated sunflower (Helianthus annuus L.) hybrids to nitrogen fertilization: growth, yield and yield components

Plant Soil and Environment ◽

10.17221/4023-pse ◽

2011 ◽

Vol 50 (No. 5) ◽

pp. 205-211 ◽

Cited By ~ 18

Author(s):

H. Özer ◽

T. Polat ◽

E. Öztürk

Keyword(s):

Helianthus Annuus ◽

Nitrogen Fertilization ◽

Yield Components ◽

Growth Yield ◽

N Fertilization ◽

Yield Response ◽

Sufficient Information ◽

Helianthus Annuus L ◽

Application Rates ◽

Yield And Yield Components

N fertilization has a substantial influence on sunflower (Helianthus annuus L.) seed yield and quality. It was also well established that high-yielding sunflower hybrids had more N requirement than old cultivars such as open-pollinated ones. However, in Turkey, no sufficient information regarding the response of new developed oilseed sunflower hybrids to nitrogen fertilization under irrigated conditions. Therefore, a 2-year study was conducted to determine the effects of nitrogen application rates on the growth, yield, and yield components of two oilseed sunflower hybrids (AS-508 and Super 25) under irrigated conditions. In this study, all plant parameters were significantly influenced by applied nitrogen fertilizer rates. Yield response to nitrogen rates was positive and linear. Our research data indicated that under irrigated conditions N rate of 120 kg/ha was adequate for sunflower production in this region.

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