| In order to find the rational intercropping pattern for apricot-crop intercropping system, the growth regulation of 8-year-old apricot was investigation and analyzed in the apricot-wheat, apricot-maize and apricot-cotton intercropping system orchard at Harbake in Luntai county.The major results were summarized as follows:1. In those intercropping system, the apricot trees were higher, the crowns of tree were bigger, the area of crops in shadow was wider. And the planting density was higher, the mutual area in shadow in row was wider.2. In the apricot-crop intercropping system, the air relative humidity presented a"high-low-high"trend. Surface temperature curve both appeared single peak shape, the highest were in afternoon, the lowest in dawn. In apricot-maize intercropping system, diurnal consumption of soil water in 80cm, 120cm, 160cm from the trunk were higher than in 40cm. That from high to low was -10cm, -20cm, -40cm, -60cm, -80cm respectively in portrait. In apricot-cotton intercropping system, the diurnal consumption of soil water in 60-80cm was higher than 10-40cm.3. Observing the different growth stage of apricot and crops, it could be found that wheat's and apricot's physiological period of fertilizer and water were superposition,thus, there was no contradiction between wheat and apricot in management of fertilizer and water. But, it would influenced intercrops'illumination from the middle and later of Apr when apricot tree had formed leaves curtain. Multiple cropping maize would influence apricot illumination and ventilation severely from elongation stage, therefore is not suitable intercropping with apricot. Apricot should irrigate in sprouting stage in Jun., but cotton's first irrigation was in Jun.. So separate irrigation for cotton and apricot was prerequisite to solve the inconsistency.4. In apricot-wheat intercropping systems, the average height of apricot tree from high to low was 1.5m×4m>4m×6m>2m×8m; the order from thick to thin of the average diameter of trunk was 4m×6m>2m×8m>1.5m×4m; the biggest crown of tree was 4m×6m followed by 2m×8m and 1.5m×4m. Compared tree characteristic between 2m×8m in apricot-wheat and 4.5m×8m in apricot-cotton at the same time, it showed that the biggest crown of tree was in 4m×6m.5. In different planting densities in apricot-wheat, the livability of flower buds living through the winter in 3m×6m and 2m×8m was higher than 1.5m×4m, 2m×4m and 5m×6m universally, and it was uniformity in the different kinds of bearing shoots between 3m×6m and 2m×8m. The floral organs mainly were pistil equal to or under androecium, the highest ratio of fertile flower was in 5m×6m. It indicated that intercropping and planting density had a great impact on the formation and the livability of living through the winter of flower bud. 6. The growth regulation of current shoots were consistent basically in 1.5m×4m, 2m×8m and 4m×6m, presenting a"fast-slow-fast"trend. The order of average leaf area from big to small among that 3 kinds of densities was 2m×8m>4m×6m>1.5m×4m. The yearly cha- nge of chlorophyll content in 3 kinds of planting densities, all got top in Sep., compared with 1.5m×4m and 4m×6m, the chlorophyll content in 2m×8m was much higher.7. In apricot-wheat intercropping systems, the fruits in 4m×6m were bigger than 1.5m×4m and 2m×8m almost in the whole development of fruit. The plangting density of apricot tree had some affection on the yield of apricot, the plangting density was bigger, the yield was higher, or the low.
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