Effects of conservation tillage on soil nutrient and organic carbon pool
The experiment was conducted with two treatments of conservation tillage of winter potato(Solarium tuberosum L .) , no-tillage with mulch of 8 cm-thick rice straw and no-tillage with mulch of 8 cm-thick rice straw covered with black plastic, to study the effect of the conservation tillage on the soil nutrient and the organic carbon pool. The results indicated that: the conservation tillage could increase the content of the soil nutrient, the content of nitrogen in the soil increased 0.81%～7.24%, the content of phosphorus increased 14.95%～19.21%, and the potassium increased 0.57%～15.40% compared with the traditional cultivation, and also the contents of total nitrogen, total phosphorus, total potassium had the significant difference with the conventional cultivation. The content of available phosphorus and available potassium was significant higher than that of the traditional cultivation; and the conservation tillage could increase the content of the total soil organic carbon and the soil active organic carbon, enhance the soil carbon pool management index in the soil of the depth of 0～10 cm, the soil carbon pool management index in the soil of 0～10 cm depth was 9.10% and 13.95% higher than the traditional cultivation's; and the soil carbon pool management index in the soil of 10～20 cm depth was lower than the traditional cultivation's. Thus conservation tillage had effects to improve soil's quality. There was no significant different effect between the two conservation tillage.
conservation tillageno-tillage with straw coveragewinter-plant potatosoil nutrientorganic carbon pool
国家科技期刊平台
NSTL
万方数据
维普
