CORRELATIONS BETWEEN SOME SOIL CHEMICAL INDICATORS AND FODDER PRODUCTIVITY OF cock's fot AND tall fescue AFTER GREEN MANURING | ЗаBИСиМОСТи между НЯКОИ ХИМИЧНИ ПОКАЗАТЕЛИ НА ПОЧВАТА И продуктивността на фураж от ЕЖОВА ГЛАВИЦА И тръстиковидна власатка СЛЕД ЗЕЛЕНО тОрЕне
2011
Lingorski, V., Institute of Mountain Stockbreeding and Agriculture, Troyan (Bulgaria) | Pachev, I., Institute of Forage Crops, Pleven (Bulgaria)
During the 2005-2007 periods in RIMSA , Troyan the correlative relationships between some soil chemical indicators soil acidity, mineral nitrogen, phosphorus and humus contents and fodder productivity of cocks foot and tall fescue pure stands after green manuring was studied. The following variants were included in the experiment: Unfertilized variant Control; Soil mineral fertilizing with N8P8K8; Green manuring with white lupine. It was found that after green manuring on cocks foot had a good expressed negative correlation in regard to dry matter productivity and mineral nitrogen and phosphorus content. Conversely, on tall fescue stand in regard to nitrogen content only negative correlations but regarding phosphorus content very slight positive correlations was established. In all variants organic carbon content was in slight positive correlations with cocks foot productivity from r = 0.1767 after green manuring to r = 0.5957 by control. In tall fescue stand a strong negative correlations after the green manuring towards the same indices was established. Regardless of the modes fertilization in cocks foot had slight positive correlations between humus content and dry mass productivity but in tall fescue after green manuring – negative correlative relationship.
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