This paper firstly described the connotation and characteristic of the vegetable logistics chain,then put forward the structural model and analyzed the main problems of the vegetable logistics chain,and pointed out the goal and measures of vegetable logistics optimization at last.

It considers that national vegetable logistics cost is high,vibrate is obvious,development is slow.

Based on two kinds of vegetable logistics modes, this paper puts forward a basic frame of actual logistics operation system, and describes in detail the relevant technical support system.

Contents of heavy metal elements in soils of vegetable greenhouses different in age;

Experimental study on the changes of nutrient salt and trace element contents in soils of vegetable greenhouse for different cultivation years;

Research on Analytical Method and Environmental Behavior of PAEs in Vegetable Greenhouse;

Taking Cangzhon of Hebie Province as an example,based on the meteorological data from 1970 to 2005,an analysis is made of meteorological factors affecting greenhouse vegetables in winter,such as extreme minimum air temperature,winter average temperature,severe temperature drop,fog,scant sunlight,gale,heavy snow and so on.

In order to study the meteorological service index of the Greenhouse vegetables for frozen injury, and provide better services for the rural economy meteorology.

Variations of Total Salt and Salt Ion Composition in Vegetables Greenhouse Soil in Suburbs of Qinhuangdao City;