中文摘要：

在枣棉间作条件下，以单作棉田为对照，研究花铃期枣树西侧冠下、东侧冠下及冠外小气候变化特征及对棉花产量的影响。结果表明，与单作棉田相比，枣棉间作光合有效辐射降低，西侧冠下、东侧冠下、冠外平均降幅分别为31．2％、23．7％、15．8％。枣棉间作棉田温度峰值出现在18：00，为45．6℃，比单作棉田早4h，温度高2．1℃，38℃以上持续时间长达4h，不利于棉花生长及产量形成。西侧冠下相对湿度最低，但土壤含水量却最高。枣棉间作皮棉产量降低，依次为单作〉冠外〉东侧冠下〉西侧冠下，分别降低11．5％、15．2％和27．9％。相关分析表明，PAR、相对湿度与皮棉产量呈显著正相关，温度与皮棉产量呈显著负相关。因此，枣树对棉花皮棉产量影响表现最大的为冠层处PAR、1．5m处温度及相对湿度，棉花单株结铃数受影响最大，其次是单铃质量和衣分。

英文摘要：

Under the conditions of jujube-cotton intercropping, the variation characteristics of cotton canopy microclimate and cotton yield were studied under the crown of jujube on the western and east- ern sides and outer crown in cotton flowering and boll-setting period, and monocuhured cotton was used as experimental control in south Xinjiang. The results showed that, compared with monocul- tured cotton, the effect of photosynthetically active radiation （PAR） decreased significantly by the 31.2%, 23.7% and 15.8% on the western side, on eastern side and outer crown respectively. The temperature peak, 45.6 ℃, of cotton field appeared at 18：00, 4 h earlier and 2.1 ℃ higher than mon- ocuhured cotton, and the duration of above 38 ℃ for 4 h, which is unfavorable to cotton growth and yield formation of jujube-cotton intercropping. The minimum relative humidity was detected on the western side of jujube, but the highest soil moisture content. Compared with monocuhured cotton,The lint yields in jujube-cotton intercropping were lower by 11.5%, 15.2% and 27.9% respectively in the order of outer crown〉under crown on eastern side 〉 under crown on the western side. PAR and relative humidity showed significantly positive relation to lint yield, and temperature was signifi- cantly negative correlation to cotton yield. Therefore, lint-yield-related microclimate factors in jujube-cotton intercropping field sequenced as canopy PAR, temperature at 1.5 m height and relative humidi- ty in descending order, and affected yield traits sequenced as cotton boll number, single boll weight and lint percentage in descending order.