The influence of different farming patterns on soil moisture and wheat yield in rotation paddy-upland crop field of Sichuan hilly area was investigated by comparing conservational farming method of straw covering with traditional farming method of non-straw covering.

Nutrient management strategy of paddy rice-upland crop rotation system;

The current status of nutrient management and strategy in paddy rice-upland crop rotation in southwest China;

Through fieldwork,investigated the effects of long-term natural no-tillage on soil physiochemical properties in rice/wheat rotation systems from different years no-tillage soil,the results showed that: under rice/wheat rotation systems,long-term no-tillage of mulching with straws had some effects on soil physiochemical properties.

Mn-deficient soil of rice-wheat rotation,the relationship between root extension and the tolerance of wheat and oilseed rape to Mn deficiency was studied by a method of field ny- lon-net which could limit root extension.