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Maize is the main dry land crops in Sichuan.Our work research the high yield and efficiency of maize in Sichuan, by increasing the frequency, plastic film mulching, seedling transplanting, balanced fertilization, intercropping system. Conducted field experiment of maize in Jianyang (2009,2010) and Renshou (2010) that is typical hill area of Sichuan. Discuss the on corn growth, yield, Nutrient accumulation and intercropping system bebefit in different high yield and efficiency.The results showed us:(1)The high yield, ultra high and the super high efficiency were significantly higher than conventional in yeild, respectively, higher than the 3.4-34.3%,18.4-47.4% and 12.7-48.7% of farmers’ practice, same of plants height, biomass, LAI and nutrient accumulation.(2)The ultra high achieve high yeild,and the fertilizer partial productivity higher than conventional and super-high-yeild. nitrogen, phosphorus partial productivity was higher than conventional at 24.9-32.6% and 21.7%-25.1%. nitrogen, phosphorus and potassium partial productivity was higher than the super high efficiency at 20.0%-25.4%, 17.1%-22.7% and 25.0%-31.8%.(3)The most obvious advantages was the wheat/maize/sweet potato, the LER of wheat/maize and maize/sweet potato was more than 1; the LER of maize/soybean was less than 1 in wheat/maize/soybean intercropping. the wheat/maize/sweet potato is better than monoculture and wheat/maize/soybean intercropping in the economic income22,004.6(yuan·ha-1).(4)In nutrient distribution, nitrogen and phosphorus were concentrated in grains, grain had 69%-74%of nitrogen and about 80%-88% of phosphorus.But the potassium was concentrated in the stem, close to 50%, relative grain had 30%-37%.(5)The plastic film mulching mode rules for corn yield was not obvious, however, it is better promote growth in the early of maize with plants height, biomass, LAI and biomass accumulation.
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