Abstract: The optimized adjustment experiment on an agroforestry model of apple trees intercropped with maize in dry valley region of upper reach of Minjiang River shows that the maize varieties characterized by early or middle maturity and short bodies were suitable for intercropping under apple trees. These varieties increased the economic output by 3.9～22.0%,while decreased the competition with apple trees. The techniques of seedling in maize cores were simple and practical. All treatments of seedling in maize core soaked with different fertilizer solutions could increase the crop yield: the treatment with 3kg CaP₂O₅/50kgH₂O had the highest increase of output,up to 36.8%; those with liquid dung, 2.5 kg urea/50kg H₂O,1.5kg urea/50kg H₂O and 5kg compound fertilizer/50kg H₂Oalso increased output by over 20%; while the treatment with 2kg CaP₂O₅/50kg H₂O increased output by 16.7%. These concentrations of different solutions were suitable for growing maize seedlings in maize cores in the test region,but the soaked time with 12～15 days was too short to decrease the seedling survival. The result from cultivation pattern experiment shows that cultivation with 45000 nests/hm²,two seedlings per nest and north south direction of leaf stretching could significantly improve output.

Key words: Fruit crop intercropping, Optimized adjustment, Maize variety selection, Seedling in maize core, Cultivation pattern