| In order to find the reasonable mode and the ecology regulation technology of Apricot-crop intercropping system which around Talimu basin area with the oasis irrigation. From Sep.2007 to Oct. 2008 , the microclimate effect, yield of 5~8-year-old Apricot and the soil water content change at Harbark village in LunTai were observed in the Apricot-wheat, Apricot-cotton and Apricot–maize intercropping system. The Spatial and time distribution also with the change of microclimate factors including light intensity, temperature, humidity and wind speed in Apricot-crop intercropping systems were studied in detail. The main results were as follows.1. Phenological observations of crops and Apricot in the intercropping systems showed that: Wheat and Apricot tree phenophase staggered and the impact of time on wheat was 66d which was 25% of the whole growth period of wheat; Maize and Apricot phenophase overlaped almost entirely and the impact of time was 90~100d; Cotton and Apricot phenophase also overlapped almost entirely and the impact of time was 180~190d which was 90% of the whole growth period of cotton .2. The results of optical characteristics effect analysis showed that: the change degree of intensity of illumination about wheat, cotton and maize canopy were different in different Apricot-crop intercropping systems. The wheat canopy intensity of illumination at different stages showed that: Grain-filling>Flowering>Heading, and the intensity of illumination of the two modes were as follows:6m mode>4m mode. The cotton canopy intensity of illuminati increased first at first and then decreased and had no obvious disparity in different period ;The maize canopy intensity of illumination of the 4×1.5m mode was only 4.2% of the CK and the cover degree was severe; The maize canopy light intensity maximum of the 8m mode was 93833lx,which was 99.6 % of the CK .The wheat canopy PAR were 6×4m>6×3m>4×2m(5a)>4×1.5m(6~7a)>4×1.5m(5a); The cotton canopy PAR were 8×4m>6×4m>6×3m>4×2m; The maize canopy PAR were Multi-peak curve in 8m mode, but maize canopy PAR was gradually reduced in 4m mode. In the same intercropping systems, the wheat canopy LAI was 6×4m>6×3m>4×1.5m(5a)>4×1.5m(6~7a)>4×2m(5a) ; The maize and cotton canopy LAI graphic were Multi-peak curve in 8m mode, and the cotton canopy LAI at the different growth stage showed that Squaring stage>Boll opening stage>Seeding stage. The canopy ALA graphic of wheat,cotton and maize change trends were all increased at first and then decreased except in 8m mode.3. The results of temperature effect showed that,the canopy average temperature of cotton in 4×2m,6×3m,6×4m,8×4m mode decreased one by one 1.78℃,1.65℃,1.1℃and 2.8℃to CK at squaring stage and 2.41℃,2.3℃,2.1℃and 1.0℃to CK at Boll opening stage. The canopy average temperature of maize in 4×1.5m and 8×2m mode decreased one by one 3.47℃and 5.5℃to CK at Small trumpet stage and 1.57℃and 2.6℃to CK at silking stage. Obviously, The temperature effect has decreased in the composite systems, The different temperature has changed with the mode and point priod.4. The results of humidity effect analysis showed that,the canopy RH of cotton in 4×2m,6×3m,6×4m and 8×4m mode increased one by one 1.03%,1.7%,1.7% and 5.1% to CK at squaring stage and 0.55%,1.46%,0.4% and 8.2% to CK at Boll opening stage.The canopy RH of maize in 4×1.5m and 8×2m mode increased one by one 5.8%and 8.4% to CK at Small trumpet stage and 0.46% and 8.2% to CK at silking stage. Obviously, The RH effect has increased in the composite systems, The different RH has changed with the mode and point priod.5. The results of windproof effect showed that the average effect of windproof the 8m wide mode ,6m wide mode and the 4m wide mode of the Apricot-crop intercropping system were 40.2 %,43.6 %and 50.7 % respectively. The apricot-crop intercropping system could bring windproof effect obviously.6. The soil moisture(SM) observations of the apricot-crop intercropping systems showed that the SM of the different observation spot in the intercropping system were different. Among the 7 intercropping system, the crops SM changed in different crops growth stages in the same intercropping systems. The results were as follows:4×2m(cotton)>8×4m(cotton)>8×2m(cotton)>8×2m(maize)>6×3m(cotton)>4×1.5m(maize)>6×4m(cotton) ; the SM in the 1.5m Apricot-crop intercropping mode showed that 4×1.5m(Squaring stage) >4×1.5m(Silking stage)>4×1.5m(Small trumpet stage)>4×1.5m(Boll opening stage); the SM in the 2m Apricot-crop intercropping mode showed that 4×2m(Squaring stage) >8×2m(Silking stage)>4×2m(Boll opening stage)>8×2m(Small trumpet stage); the SM in the 4m Apricot-crop intercropping mode showed that 8×4m(Squaring stage) > 6×4m(Boll opening stage)>6×4m(Squaring stage)>8×4m(Boll opening stage).7. The results of crop production investigation showed that the wheat production decreased 77.3% compared to the CK in 4m mode and it decreased 67.3% compared to the CK in the 6m mode; in the Apricot-cotton intercropping, the Seeding cotton production were decreased 7.7%,8%,9.1%,25.27% and70.2% respectively in the 8×4m,8×2m,6×3m,6×4m and 4×2m mode compared to the CK. Obviously, the production decreased very hard in the apricot-crops intercropping system.8. The Economic benefits results showed that the output value of the 6×4m,6×3m,8×2m,8×4m apricot-cotton intercropping system were 1.7,1.6,1.37and1.3times than the control field; the output value of the 6×3m,6×4m,4×2m,4×1.5m(5a),4×1.5m(6~7a)apricot-wheat intercropping system Were 2.5,2.4,2.1,1.6 and1.5 times than the CK2, Obviously, the output value of apricot-cotton intercropping system was better than apricot-wheat intercropping system, both of the output value are better than the CK1.
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