Abstract: In 2006, the experiment was conducted in Hohhot, study on ecological effect of the intercropping of different crops and oats in Inner Mongolia. Determination of light intensity by ZF-77-luxmeter,the results showed: Keduo 8,Mennongqingsi 1,Nongken 4,Zihuabaicompared with monocropping, illumination intensity of middle part and illumination intensity of bott}}m increased, and transmittance increased;Zihuabai illumination intensity of middle part and bottom decreased 40.6%,66.3%,and transmittance decreased 26.3%,5.4%。Determination of 5,10、15,20,25,30cm depth ground temperatures by CRB electronic instrument for measuring temperature,Depth soil temperature of 3cm -30cm decreases from top to bottom, the same temperature of intercropping is higher then monocropping;average temperature of five centimeters soil layer at whole growth stage increased by0.7-0.9C. After harvest, determination of crude protein and crude fat content by micro-kjeldahl method and suxhlet extraction, eiude protein and crude fat content in intercropping system were greater than those for monocropping. The yields of green forage and hey for intercropping system were increased by 37.5%、15.9%,9.9% 24.2% and 2.3%、15.0%,9.0%、16.4% as compared with monocropping crops, and grain increased by 1.1%、12.2%、10.9% and 12.9% as compared with monocropping crops. Integrated analysis indicates that intercropping system can take advantage of light, temperature resources oflocal fields sufficiently, enhance the yield and nutrient condition.

Key words: Oats, Intercropping, Illumination intensity, Yield

CLC Number: 

• S512.6