مرکز منطقه ای اطلاع رساني علوم و فناوري - Efficiency of different methods in improvement of base rangeland: I. Agronomic traits

Abstract :

The aim of this study was to determine the efficiency of fertilizing (F) and in addition to F, resting (R), over-seeding (OS), aeration (A), spring cutting (SC), selective herbicide (S) and OS (100 cc da^-1 picloram, SOS) and total herbicide (T) and OS combinations (600 cc da^-1, T600OS veya 300 cc da-1 glyphosate, T300OS) in terms of agronomic traits such as yields of hay and crude protein and botanical composition of a base rangeland. In the control group (C) was prevented only the overgrazing and untimely grazing. The research was carried out in rangeland in Samsun between 2006 and 2009 years according to randomized block design. Hay yield of the C plots was about three times higher in the endof the 3 years than beginning of the experiment. F, F+R, F+A and F+SC applications eliminated highly Eryngium bithynicum+Centaurea carduiformis species in the end of the 3 years. In the end of the study, the ratio of these invasive species was less than one-seventh of what it was at the beginning of the experiment. In general, legumes and other families took the place of these invaders. The most effective and economical method to increase hay production in studied rangeland was F+R combination. This application produced a two, seven and fifteen fold increase in hay production in the first, second and third years, respectively when compared to the beginning of the study. According to the results, it can be said that F+R combination was the most effective and economic method to improve the studied rangeland to increase the hay yield.