The influence of fertilizer system and efficacy of growth regulator on buckwheat productivity under the conditions of north-east forest steppe of Ukraine
Abstract
M.V. Radchenko, A.O. Butenko, Z.I. Hlupak
The influence of mineral fertilizers and growth stimulator on buckwheat productivity under the conditions of north-east forest steppe of Ukraine is researched. On the basis of conducted researches it was defined that macro- and microelements influenced the amount of chlorophyll in buckwheat leaves. On the average in the research the content of chlorophyll in buckwheat leaves was 4.51-4.95 mg per g of wet weight. In the research, as for the influence on chlorophyll content, the variant with application of N45P45K45 – 4.95 mg/g was the best one. It was more on 0.44 mg/g in comparison with control variant (4.51 mg/g). Applying growth stimulator Humifild VR-18 and N34 chlorophyll content increased on 0,21, 0,38 mg/gr of wet weight. In the variants with the dose of mineral fertilizers N45P45K45 kg/ha the maximum display of plant height was noted in flowering period – 94.0 and 115.0 cm in fruiting stage. In fruiting stage the greatest number of leaves was formed by the dose of mineral fertilizers N45P45K45 – 26.0 pieces per plant. It was more on 8.3 % (24.0 pieces per plant) by N34, on 30.0 % (20,0 pieces per plant) by Humifild VR-18 and on 53.0 % (17,0 pieces per plant) without fertilizers. The research findings show that such elements of yield structure as the amount of grain from a plant, grain weight from a plant, weight per 1000 seeds, technological index of grain quality and uniformity aggregate in the best way by mineral fertilizer application in the dose N45P45K45. The use of growth stimulator Humifild VR-18 and mineral fertilizer in the dose N34 affected negatively first of all plant population and its conservation during the growing season, grain content of a plant, grain weight from a plant, weight per 1000 seeds and uniformity. On the average during the years of research the highest indices of productivity were gained by the use of mineral fertilizer in the dose N45P45K45. It facilitated the maximal weight of 1000 seeds – 30.1 g with grain amount on a plant – 48.7 pieces, grain weight from a plant -1.4 g and the highest uniformity in the experiment – 82.4 %.
<