The Study Of The Soil Nutrient And The Plant Production Potential Of The Riparian Zone In Different Sections Of Liaohe River Mainstream

River is an indispensable important factor to human,providing people all kinds of water,also survival and reproduction with biological conservation and other ecological functions.With the development of economy,the river ecosystem damaged by people factor,the riparian zone plants and soil conditions have also been affected.This article studied the Liaohe river riparian zone of soil nutrient and its main plant community root activity,biomass and seed bank.The results are as follows:(1)Different sampling section and the same sampling area different soil depth of soil 7 soil nutrient index has carried on the exploration on Liaohe mainstream riparian,the results show that in Liaohe mainstream riparian different sampling time,sampling area,and the lower level of the soil nutrient index exists significant difference.Different extents nutrition content overall show:the liaohe mainstream nutrient content of overall level is higher in July;In each section of the soil nutrient level compared the section of Kaiyuan-Tieling-Shenbei>Changtu-Kangping-Faku>Xinmin-Liaozhong-Taianxinmin,and surface soil nutrients content is better than the lower.(2)Changtu-camping-Faku,Kaiyuan-tieling-Shenbei,Xinmin-Liaozhong-Taian and.Panjin the Liaohe River riparian zone and find that in addition to Sanhexiala,Pingdingpu,Daniu and Panshanzha the individual sites,all show that Asteraceae annuals plants have high root vigor and the have a high degree of significance compared with other plants.Study on vegetation and environment of the riparian zone in Liaohe River,the main factors influencing the root vigor of the plant are total nitrogen(TN)and total potassium(TK).Comparison of root activity of plant with different riparian sample points:Fanhe,Shuanganqiao.Pingdingpu,Wukeshu,Sanhexiala their plants have higher roots vitality and Dazhang,Fudedian have lower roots vigor.(3)Different plants have different biomass fresh weight and dry weight.The main factor of affect liaohe river plant biomass fresh weight than is TN and AK.Liaohe river plant biomass dry weight than the main factors of the TN and TK.Annual herb AGB/BGB fresh weight ratio is greater than the dry weight ratio,the result shows that the annual herb more vigorous life force,a leading role in the community is built(4)The liaohe river riparian zone has a mass soil seed bank.Soil seed banks is greater than the spring autumn soil seed Banks.Spring soil seed Banks with a total of 49 kinds of plants,belonging to 21 families and genera,76 the ground vegetation,56 genera belonging to 22 families,The autumn soil seed Banks with a total of 40 kinds of plants,belonging to 36 genera and 20 families,68 the ground vegetation,belonging to 51 genera and 22 families.Compositae and gramineae grasses of obvious advantages.No significant difference between the seed bank size,each section section significant difference between the upper and the lower seed bank size,the top seed bank size for below 3-5 times.Each section the similarity coefficient of soil seed bank and standing vegetation on the low side.shows that early reserve vegetation community succession,vegetation types vary considerably.Soil seed bank and standing vegetation species diversity index trends are similar,and species diversity from upstream to downstream the decrease trend.The soil seed bank of liaohe river riparian zone saved a large number of plants,provenance basis is provided for vegetation restoration for the reserves,is the source of plant community production potential,plays an important role in the vegetation restoration.