Simulation of the dry matter production and seed yield of common beans under varying soil water and salinity conditions

Autor:	S.G.K. Adiku, Michael Facklam, Gerd Wessolek, Manfred Renger, C. Hecht-Bucholtz
Rok vydání:	2001
Předmět:	Hydrology Soil salinity biology Osmotic shock Field experiment food and beverages Soil Science biology.organism_classification Salinity Agronomy Dry weight Soil water Environmental science Dry matter Phaseolus Agronomy and Crop Science Earth-Surface Processes Water Science and Technology
Zdroj:	Agricultural Water Management. 47:55-68
ISSN:	0378-3774
DOI:	10.1016/s0378-3774(00)00094-9
Popis:	We present a model that simulates the effects of water and salinity stress on the growth of beans. The model derives a combined soil water/salinity stress factor from the total water potential (combination of the matric and the osmotic potentials) and uses this stress factor as a growth limiter in a growth model. The model was tested on data obtained from two greenhouse trials of beans ( Phaseolus vulgaris ) grown under a range of soil water and salinity conditions. The simulated dry weight of the bean generally followed those observed. In the first trial, the comparison between simulated and observed total dry weight and seed yield gave R 2 values of 0.97 and 0.92, respectively. Comparison of the simulated to the observed dry weight for the second trial gave R 2 values of 0.85 and 0.89, respectively. These indicate a good performance of the model in general. The principle of deriving a combined water/salinity stress from the matric and osmotic potentials is simple and can be included as a simple routine in many existing crop models without much difficulty.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4b9085d48f609fdfc7810c754dfd0f7d https://doi.org/10.1016/s0378-3774(00)00094-9 Zobrazit plný text záznamu Full Text from ScienceDirect