Study On The Physic And Chemical Properties And Hydrology Effects Of Soil About Theropencedrymion In Limestone Mountainous Of Linqu County

To explore the physical and chemical character and hydrological effect of soil of theropencedrymion in limestone mountainous, choose appropriate theropencedrymion for limestone mountainous,for Shandong province and even in north of China builds and restores soil and water conservation forest significance. This study in shimen fang small watershed of Linqu county in the construction of different forest types of mixed forests as the research object. Different kinds of mixed forest types soil nutrient content, forest tree growth, litter volume, soil infiltration rate, soil physical andchemial character, soil erosion and soil hydrology effect were quantitative analysised and the quantitative evaluation. Determine and choose the improved effect is better, ecological forest types of mixed forests. Study the following conclusions:(1) The growth of the trees has close relationship with the mixed forest tree species selection, for Platycladus orientalis, it grows best in Platycladus orientalis(L.) Franco and Robinia pseudoacacia Linn. mixed forests and it grows second best in Platycladus orientalis(L.)Franco and Cotinus coggygria Scop. mixed forest and Platycladus orientalis(L.) Franco and Acer mono Maxim mixed forest and it grows worst in Platycladus orientalis forest。(2) Which forest has the most litter volume from 5 types of mixed forests of different forest types is Cotinus coggygria Scop. forest with large leaf. It is Cotinus coggygria Scop. forest who has the most litter volume, then it is Platycladus orientalis(L.) Franco and Robinia pseudoacacia Linn. mixed forests and Platycladus orientalis(L.) Franco and Cotinus coggygria Scop. mixed forest who has the second litter volume and it is Platycladus orientalis(L.)Franco and Acer mono Maxim mixed forest and Platycladus orientalis forest has least litter volume.(3) The soil physical properties character of 5 different kinds of mixed forest types has a significant difference and they are all obviously better than that in contract plot. For improvement of soil physical character of 5 different kinds of mixed forest types, the Platycladus orientalis(L.)Franco and Robinia pseudoacacia Linn. mixed forests and Cotinus coggygria Scop. forest has the best improvement effect, and the Platycladus orientalis(L.)Franco and Cotinus coggygria Scop. mixed forest and Platycladus orientalis(L.) Franco and Acer mono Maxim mixed forest has the second improvement effect and Platycladus orientalis forest has the worst improvement effect.(4) The soil hydrological effect and soil infiltration rate of 5 different kinds of mixed forest types has a significant difference and they are all obviously better than that in contract plot. For improvement of soil hydrological effect and soil infiltration rate of 5 different kinds of mixed forest types, the Platycladus orientalis(L.) Franco and Robinia pseudoacacia Linn. mixed forests and Cotinus coggygria Scop. forest has the best improvement effect, and the Platycladus orientalis(L.) Franco and Cotinus coggygria Scop. mixed forest and Platycladus orientalis(L.)Franco and Acer mono Maxim mixed forest has the second improvement effect and Platycladus orientalis forest has the worst improvement effect.(5) The soil erosion of different forest types of mixed forest has a significant difference. For the amount of reducing soil erosion compared to the control of 5 different forest types, the most is Platycladus orientalis(L.) Franco and Robinia pseudoacacia Linn. mixed forests and the second is Cotinus coggygria Scop. forest and Platycladus orientalis(L.) Franco and Cotinus coggygria Scop. mixed forest and the least is Platycladus orientalis(L.) Franco and Acer mono Maxim mixed forest and Platycladus orientalis forest.(6) The soil nutrient content of 5 different kinds of mixed forest types has a significant difference. The order about soil nutrient content in different forest types of mixed forest is following: Platycladus orientalis(L.) Franco and Robinia pseudoacacia Linn. mixed forests> Cotinus coggygria Scop. forest > Platycladus orientalis(L.) Franco and Cotinus coggygria Scop. mixed forest> Platycladus orientalis(L.) Franco and Acer mono Maxim mixed forest > Platycladus orientalis forest.