广西甘蔗种植收益的影响因素实证分析

广西是我国最主要的甘蔗生产基地,近年来甘蔗种植收益出现不同程度下降.为了研究甘蔗种植收益波动的影响因素,本文采用VAR模型对广西甘蔗收益的影响因素进行实证分析,结果显示:甘蔗收购价格变动1％会引起甘蔗种植收益变动6.299％;甘蔗生产成本与甘蔗种植收益呈现负相关,生产成本变动1％会引起甘蔗种植收益变动3.515％;甘蔗...     

农户种植三七意愿的影响因素分析——基于云南省文山州的调查

目的对农户种植三七的意愿及其影响因素进行分析,为保障我国三七产业的健康稳定发展提供理论依据。方法以云南省文山州实地调研结合问卷调查所得的农户种植三七意愿的相关数据为基础,从户主特征、家庭特征、三七种植特征、外部环境4个方面选取变量,通过建立二元Logistic回归模型,分析农户种植三七意愿的影响因素,并基于此提出相关的对策建议。结果户主年龄、家中总人口数、三七亩产量、是否贷款及是否参加过三七种植培训对农户种植三七的意愿具有显著影响。户主年龄越大,种植三七的意愿越弱;家庭人口越多且所处年龄段越均匀,种植三七的意愿越强烈;三七亩产量越高,越能提高农户种植三七的积极性;贷款使得农户对三七收益的期望值变大,与种植三七的意愿负相关;三七种植培训普及度低,且与农户种植三七的意愿呈负相关。结论应促进生态种植、提高三七质量,加强科技发展、解放劳动力,完善技术培训体系、提高生产力,打造三七品牌、扩大影响力,以达到提高农户种植三七积极性的目的。     

昆明市花卉旅游的创新发展思考

昆明市花卉旅游促进了城市旅游的发展,对提高旅游品质起到了重要作用。本文通过调查昆明市花卉旅游发展现状,分析存在的问题,并提出创新发展对策。     

安徽省17地市旅游开发的空间关联分析

从空间关联的视角出发,运用空间统计分析方法对安徽省17个地市旅游开发的空间关联度进行数据分析。选取2009年安徽省17个地市人均旅游收入为观测值,通过计算全局空间自相关指数（Global Moran′sI）,发现其旅游开发在整体上存在着显著的空间自相关。进一步计算各地市的局部空间自相关指数（Local Moran′sI）,结果表明,大多数地市的旅游开发与邻近地市在局部区域存在明显的空间关联性,在地理空间上存在显著的集聚现象。     

福州市周边乡村旅游发展的SWOT分析及对策

福州市周边有着丰富的乡村旅游资源。本文分析了福州市发展周边乡村旅游的优势、劣势以及面临的机遇和挑战,并从乡村旅游规划与管理、基础设施建设、乡土民俗文化特色项目开发和市场营销策划四个方面提出了福州市周边乡村旅游发展的策略。     

Water supply from pearl millet by hydraulic lift can mitigate drought stress and improve productivity of rice by the close mixed planting

The authors have proposed the close mixed planting technique using mixed seedlings of two different crop species that results in close tangling of their root systems. Especially, the combination of drought-adaptive upland crops (e.g. pearl millet or sorghum) and flood-adaptive lowland crop of rice would be beneficial to overcome the drought and flood conditions and to reduce the risks of crop failure. In our previous studies, we found that upland crop yield losses by flood stress was mitigated by mix-cropped rice, owing to the oxygen gas released from the rice roots into the aqueous rhizosphere. In the present study, we conducted two experiments to assess whether mixed cropping a drought-resistant cereal, pearl millet, would improve the performance of co-growing drought-susceptible crop, rice under drought conditions. In the field experiment, some grains were obtained from the rice plants mix-cropped with pearl millet under drought condition. However, no rice matured in the single cropping system. In the model experiment using deuterium analysis, it was confirmed that water absorbed by pearl millet roots from deep soil layer was utilized by rice, suggesting that mix-cropped rice could withstand drought stress and complete grain filling using water released into the upper soil layer by hydraulic lift.