THE EFFECT OF IMPROVING SOIL FERTILITY IN DIFFERENT MEASURES OF HUMUS UNITED IN THE CINNAMON SOIL OF THE EASTERN PARTS OF HEBEI PROVINCE

In this paper, the effect of improving soil fertility with different measures on humus united pattern in cinnonmon soil was studied The results showed the proportion of loose united humus to heavy humus and the ratio between loose and tight united humus were important indices of reflecting the effect of improving soil fertility Using no fertilizer or mere constant NPK fertilizer not only lessened the content of the loose and tight united humus but also decreased the proportion of loose and tight united humus to heavy humus and the ratio between loose and tight united humus Using organic fertilizer in combination with chemical fertilizer not only raised the content of loose, stable and tight united humus but also the proportion of the loose united humus to heavy humus and the ratio between the loose and tight united humus Humus was activated and renewed The supply of soil nutrition and soil fertility was improved