| In this article,the author has made theinvestigation to the interplanting place soil condition, theinterplanting system component basic growth situation. Through the research to different new varietypawlownia's growth character, the author has made examination of pawlownia - agriculture interplanting systemeconomic efficiency and the ecology benefit, has selected the improved seed positively, has managed to the pawlownia scientifically.Then, Causes the pawlownia - agriculture interplanting and agricultural- poplar tree artificial ecosystem management way coordinates, toform one kind of special pawlownia - poplar tree - agriculture to mixhands over the pattern, increases the northern Jiangsu plain area theeconomic efficiency, the ecology benefit and the social efficiency. Main findings as follows:(1) compares with the comparison, the interplanting soil moisturecontent, the pH value, the organic content quite are high, capacity weight comes between, is higher than the plant nursery place slightly, theentire phosphorus content, the effective phosphorus content are higher than the pure agricultural place; look the aggregate level ,deepens along with the soil layer, the pH value, capacity weight increases,fertility factor content , water content, organic matter reduces; the character change tendency about the interplanting place is similar with the plant nursery place.(2) in the interplanting soil entire nitrogen, the entire phosphorus,the effective phosphorus, the organic content are very high, can meet the basic performance needs which the forest grows, but along with crops sowing seeds, the growth to the soil in the nutritive elementsabsorption and the use, later period should supply the phosphate fertilizer suitably to guarantee the forest grows, root system developed to in-depth inferior soil nutrient demand; should pay attention to interplanting draining water in the precipitation quiteabundant time, avoids forest rotten root possibility which the pondingbrings.(3) there is a quite remarkable relevance between the forest nutritive elements content and the soil nutritive elements content. In the interplanting and the plant nursery center, the effective phosphorus content separately occupies the entire phosphorus content 8.16%, 8.89%, explained theentire phosphorus transforms well as the effective phosphorus,simultaneously also has the bigger phosphate fertilizer use space;along with the forest and crops' growth, the improvement soil condition, transfor more entire nitrogen in the soil to the hydrolisis nitrogen is extremely essential.(4) it existences certain uniformity in interplanting system pawlownia and poplar tree's growth, plant nursery center different variety pawlownia's growth condition also so; the growth factor and the nutritive elements content has the certain relevance but to relate quite slightly, under the different condition of local growth, relevant existence difference.(5) unifies the different condition of local growth and the different character in difference time, does the kind of analysis to trees'growth superiority gathers, divides into severalkinds: Interplanting place Soviet tung oil tree 3 and NL-203 Yang forthe first kind, this kind of tree seed growth condition are best;Plant nursery place Soviet tung oil tree 3 with 8B are the secondkind, the growth condition slightly misses to the first kind; Woolwhite 33, 4A, 26A and lap waste pawlownia growth condition worst,belongs to the third big kind but wool white 33, the 4A growth condition in a year is better than 26A and the lap waste pawlownia.(6) from the aggregate level, we can see that the interplanting center forest,the crops to the soil nutrient absorption and the use compared to theare pure agricultural center crops to the soil nutrient use to have todisplay a bigger superiority, therefore under the northern Jiangsuplain area similar condition of local growth, carries out the tung oiltree Yang agriculture interplanting pattern is feasible.
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