| Study on photosynthetic characteristics of cotton canopy under apricot-cotton system in the south Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2010.04.32 |
| Key Words: apricot-cotton system cotton intensity of illumination photosynthetic active radiation leaf area index |
| Author Name | Affiliation | | ZHANG Jianxiong | College of Agronomy, Northuest A & F University, Yangling， Shaanxi 712100， China | | LIU Chunjing | Agricultural Technology Popularication Center of Luntai County，Luntai, Xinjiang 841600，China | | ZHANG Baojun | College of Agronomy, Northuest A & F University, Yangling， Shaanxi 712100， China | | TAN Yongjun | Agricultural Technology Popularication Center of Luntai County，Luntai, Xinjiang 841600，China | | CHEN Ruiping | Agricultural Technology Popularication Center of Luntai County，Luntai, Xinjiang 841600，China | | CHEN Yaofeng | College of Agronomy, Northuest A & F University, Yangling， Shaanxi 712100， China | | LI Zhongguo | College of Agronomy, Northuest A & F University, Yangling， Shaanxi 712100， China |
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| Abstract: |
| A study was carried out to find out the photosynthetic characteristics of cotton canopy and dynamic effects
of shading on cotton yield under apricot cotton system. With the cotton variety of Zhongmian 43 as test material and under four types of apricot cotton system，the cotton canopy intensity of iluminat ion，photosynthetic active radiat ion, leaf area index and constituent elements of yield were studied. The result showed that:①The canopy intensity，photosynthetic active radiation, leaf area index of cotton sowed in broader width is better than that in narrower width (6m×4m>6 m×3m>4m×2m>4 m×1.5 m), and the graphic trends increased at first and then decreased.②The cotton produe-tion and the main growth parameters are extremely different under the four different modes : the cotton yield，abscission rate of boll, plant quantity of harvest is significant ly different , and the average cotton yield reached 6 092. 59 kg/ hm2 under the modeof 6 m×4 m, which is 3.1 times of that under the mode of 4 m×1.5 m mode.③The order of output val-ue of both monoculture and apricot-cotton systemis: 6m×4m>6m×3 m >CK>4m×1.5m>4 m×2 m. |
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