Effect of different levels of water supply on certain microclimatic properties of soya stands

• Published in: Növénytermelés Vol. 39; no. 4
• Main Authors: Anda, A, Ligetvari, F. (Pannon Agrartudomanyi Egyetem, Keszthely (Hungary))
• Format: Journal Article
• Language: Hungarian
• Published: 1990
• Subjects: GLYCINE MAX; IRRIGATION; MICROCLIMA; MICROCLIMAT; RENDEMENT DES CULTURES; RENDIMIENTO DE CULTIVOS; RESISTANCE AUX MALADIES; RESISTENCIA A LA ENFERMEDAD; RIEGO
• ISSN: 0546-8191

Various properties of the microclimate of soya plants were studied in an evapotranspirometer /ET/ and in the field on Ramann's brown forest soil in Central Transdanubia, with a row distance of 65 cm and a seed number of 60 per m. The seed boxes measured 4 m2, with a depth of 1 m, and the field plots had similar measurements. The ET boxes were regularly watered in order to maintain the microclimate. Measurements were made on the leaf area, stoma resistance, plant surface temperature, relative humidity and plant height. The experimental year /1986/ was drier than the average for the previous 15 years, the precipitation deficiency being some 30 mm, while the temperature from April to August was 1.8-3.0 oC higher than average. Results: The height and leaf area of the ET plants were considerably greater than those of the field control, but the lower leaves withered away due to the fungal infection in August. In the ET evaporation was more intensive; prior to the closing of the plant stand and at ripening there was a difference in the microclimate, in sunny weather, in favour of the ET as regards soil temperature. No significant difference was found between the other data measured. The yield quantity incresed by 21.4 o/o, as the result of irrigation, which, however, also seems to have reduced the resistance to fungal disease.