SHORT TERM EFFECT OF GREEN MANURING ON SOIL INHABITING NEMATODES AND MICROORGANISMS
In a microplot experiment white mustard, tancy phacelia, oat and field pea were sown in August as aftercrops and dig into soil in October. The total number of bacteria increased rapidly after green manuring, and it was closely followed by bacteriovorous nematodes. Increase of fungi followed peak of bacteria. Fungivorous nematodes remained at a low level. The population of microorganisms and nematodes grazing on these microorganisms declined after three months. Green manuring did not affect significantly omnivorous nematodes of Dorylaimina. It was calculated that nematodes consumed 21% of C introduced with phacelia, 26% of C from oat, 29% of C from mustard and 49% of C from pea during five months following treatment. The N consumption was estimated as being between 1-3 kg N ha[sup-][sup1].