进行掠夺的

Seventhly, we sets up the reaction-diffusion equations about population-resource relationships; Further more, we analyzes these typical conceptual models making use of differential equation theory. The conclusion shows that human with natural environment co-exist conditions when human-environment is conflicting, mutual, predacious, harmonious. The relation both human and environment has to harmonious each other for the population-resource benefit maximum.

在连续时间条件的假设下给出了关于人口与农业生态资源的具有代表性的几种反应扩散方程形式；根据微分方程定性理论，对所建立的几种模型进行分析研究，得出当人类与生态环境处于冲突、互助、掠夺与和谐状态时，双方能长久共存的稳定条件，并得出只有在人口与资源和谐共处的情况下，才能使环境承载力及人类总数达到最大化的结论。

In the basis of researching and reflecting the resources of environmental crisis, the concept of environmental ethics of sustainable development believes the antinomy between human and nature is the deep resource of environmental crisis. The concept of environmental ethics of sustainable development attempts to change the old pattern of development, which was by the means of robbing the nature and at the cost of enlarging resource consumption. It attempts to buildup a new harmonious ethics relation of man and nature in order to resolve the environmental crisis facing the human being and ensure the harmonious development of society and nature through refiguring the ethics relation between man and nature and comprehending the value of nature correctly.

可持续发展的环境伦理观在对环境危机的根源进行探索与反思的基础上，指出人与自然关系的对立是环境危机的深刻根源，它希望通过从多方面重塑人与自然之间的环境伦理关系，通过对自然价值的正确理解，改变人类旧有的以增强对自然的征服和掠夺为手段，以扩大自然资源的消耗为代价的发展模式，建立起人与自然之间和谐的新伦理关系，以解决人类面临的环境危机，保证人类社会与自然的和谐发展。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。