为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

为促使中国南方拥有合理的载畜量和保证其生态系统的良性循环,以湖南道县为南方养殖典型区示例,系统分析南方饲草资源的种类,及其......

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Wildlife, especially mammals populations dynamics in many conservation areas are influenced by ecosystem processes and i......

对草原生产者──消费者的二级系统的一般动力学模型进行了深入的研究，得到了非负解的整体存在性、零解的全局稳定性以及正平衡解的......

Geophagy is the deliberate consumption of earth materials such as soils,clays or sediments by human and animals.The inge......