Author/Authors :
popović, vera institute of field and vegetable crops, Novi Sad, SERBIA , kolarić, ljubiša university of belgrade - faculty of agriculture, Belgrade, SERBIA , živanović, ljubiša university of belgrade - faculty of agriculture, Belgrade, SERBIA , ikanović, jela university of belgrade - faculty of agriculture, Belgrade, SERBIA , rajičić, vera center for small grain, Kragujevac, SERBIA , dozet, gordana megatrend university - faculty of biofarming, Bačka Topola, SERBIA , stevanović, petar inspection affairs administration of republika srpska, Banja Luka, BOSNIA AND HERZEGOVINA
Abstract :
Soybean (Glycine max (L.) Merrill) is important legume which is used for humans diet and animal feeding. Beside the significance of certain agro-technical measures (choice of variety, sowing techniques), some physiological indicators, such as the net production of photosynthesis (NAR), are also important for yields achieving and evaluating. The study of the row spacing effects (20, 45 and 70 cm) on the productivity of photosynthesis of soybean varieties (Bosa, Balkan and Dragana) were carried out on the soil type of chernozem. The tendency of growth of surface area and number of leaves per plant was recorded up to the fourth measurement in the Bosa and Balkan varieties and until the fifth measurement in the Dragana variety, when the seed formation phase (R5) was established. The highest NAR was observed in early stages of growth, 10-25 days after emergence, while decreasing in later stages. The highest values of NAR in both examined years were recorded at square sowing (20 cm).
Keywords :
soybean , variety , row spacing , productivity of photosynthesis
