Under various soils,groundwater levels and soil temperature during days of growth of upland rice root system were studied by three-dimensional coordinate container method stages,the growth.The results were as follows:1.Under various soil conditions,the depth of root system distribution was generally about 0.60 m.2.Regardless of soil types root volume,total area and active area of root surface,root length,dry weight of roots and root density decreased gradually with soil vertical depth,but active/total area of root surface fluctuated lightly.Giving overall consideration to all root parameters,the growth of upland rice root system was the best in red clay soil,the next was in sandy fluvo-aquic soil,the worst was in paddy soil.3.Under various groundwater levels,root length,root dry weight,and the distribution of every soil layer were the treatment A(6 car water layer)>B(4 cm water layer)>C(2 cm water layer),root volume and root density decreased gradually with root system vertical distributiou depth,but the treatment of A increased strongly between 0.30 m and 0.50 m.Total area and active area of root surface of A and B increased or decreased with root system vertical distribution depth,total area of root surface,active area of root surface of C decreased with root system vertical distribution depth,and active area/total area of root surface of A,B,C increased with root system vertical distribution depth.4.Under various soil temperature,root length,root dry weight and root volume,root density,total area and active area of root aurface decreased gradually with root system vertical distribution depth,the increase of soil temperature and the decrease of the accumulation of temperature during days of growth stages.The distribution of every layer/total quantity of root volume was not different between the treatment of b(date of sowing:8th,May) and c(date of sowing:8th,June),but was evident difference between b (date of sowing:8th,May),c(date of sowing:8th,June) and a(date of sowing:8th,April);the distribution of every layer/total quantity of root dry weight was not different between the treatment of a and b, but was different evidently between a,b and c;the distribution of every layer/total quantity of root length was not different between a,b and c; active area/total area of root surface of a,b,c increased with root system vertical distribution depth,the increase of soil temperature,the decrease of the accumulated soil temperature during days of growth stages.The ratio of active area to total area of root surface is in order of the treatment a