Hierarchical analysis of soil cultivation systems efficiency as agrotechnological method of destruction of weeds and milkweed (Asclepias syriaca L.)

Abstract

In work on the basis of experimental data by means of hierarchical procedures of statistical analysis optimum modes of soil mechanical cultivation as agrotechnical approach of the control of weeds community as a whole and milkweed abundance have been established. Disposable mechanical destruction of weeds by ploughing or discing leads to augmentation of the general contamination of not treated earths at 22,30 % (ploughed land) and 26,65 % (discing). Cultivation which was spent after a ploughed land led to decrease on 37,42 % of an aggregate number of weeds, and cultivation after discing to decrease of number of weeds on 44,58 %. Carrying out of the second cultivation after a ploughed land provided  destruction of 70,1 % of weeds in comparison with the control and 52,2 % in comparison with the first cultivation. Carrying out of ploughing after discing and cultivations leads to decrease of total weeds on 73,69 % compared with the control and on 52,52 % compared with consecutive discing and cultivation. Disposable cultivation essential does not influence on a lobe which occupies milkweed in assemblage of weeds. Cultivation after a ploughed land reduces a lobe milkweed on 19,20 %, and after discing on 13,03 %. The third cultivation of bedrock does not render influence on selective destruction of milkweed.