[Objective] This paper analyzed different periods of choosing behavior and influencing factors of fanners'tomato planting on the basis of investigation data of 182 farmers in Changji, Xinjiang. [Method] Statistical analysis and multinomial Logit Model were used. [Result] The regression results indicate that farmers make different planting choices in the face of different output, price and risking factors. The basic characteristics of farmers, households and tomato planting make them to choose different periods to plant tomatoes. [Conclusion ] Compared with the late -maturity tomato planting, farmers'ages, their educational levels and factors of planting scale have significantly negative impact on farmers'choosing behavior in planting early - maturity tomatoes. Whereas farmers'ages, planting experience, irrigation technology, whether or not to join tomato order and other factors have significantly positive impact on farmers' choosing behavior in planting intermediate - maturity tomato compared with the former.%[目的]定量研究玛纳斯河流域(以下简称玛河流域)不同地貌类型和植被覆盖下的土壤物理性质,以期为深入研究玛河流域盐碱土改良和农业生产耕作提供科学参考.[方法]综合考虑玛纳斯河流域干三角洲、冲积平原和冲积扇扇缘带三种主要地貌类型和植被覆盖的不同,对其上生长的柽柳(Tamarix ramosissima)、盐穗木(Halostachys caspica)、猪毛菜(Salsola spp.)、小叶碱蓬(Suaeda microphyll)四种植被覆盖类型下的土壤含水率、土壤容重、颗粒组成和有机质进行研究,并利用SPSS13.0软件对土壤各项物理指标进行方差分析.[结果]从干三角洲到扇缘带,0 ～100 cm剖面内土壤平均含水率和有机质逐渐升高；土壤平均容重表现为干三角洲＞扇缘带＞冲积平原区；颗粒组成干三角洲砂粒含量为58.04％,达到最大,冲积平原区主要以粉粒为主,为56.21％.在立地垂直剖面上,随着土壤深度的增加,土壤含水率和容重均表现出显著性升高；土壤有机质显著性降低.相比对照的空裸地,四种植被类型在0～100 cm剖面内土壤平均含水率分别提高了19.03％、8.93％、8.20％、13.18％；土壤平均容重分别降低了13.07％、7.95％、16.48％、2.84％,平均土壤有机质含量分别提高了70.44％、39.41％、5.63％、14.05％；平均砂粒含量分别降低了35.57％、27.50％、15.97％、17.72％.[结论]玛纳斯河流不同地貌和植被类型下的土壤物理性质存在在显著差异性；相比空裸地,耐盐盐生植物,可以增加植被覆盖度,提高土壤保水能力,对流域农业垦区盐碱土的改良具有重要的意义.
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