Influence of soil bulk density on distribution and uniformity of water and nitrogen under film hole irrigation with fertilizer liquid free infiltration
TUO Yun-fei,WANG Ke-qin,ZHANG Zhen-wei,FEI Liang-jun,HU Bing-hui
TUO Yun-fei,Environmental Science and Engineering Department,Southwest Forestry University,Kunming 650224,China; WANG Ke-qin,Environmental Science and Engineering Department,Southwest Forestry University,Kunming 650224,China; ZHANG Zhen-wei,Yunnan Datang International Electric Power CO .LTD .,Kunming650011,China; FEI Liang-jun,Key Laboratory of Northwest Water Resources and Environment Ecology of Ministry of Education,Xi′an University of Technology,Xi′an710048,China HU Bing-hui,Environmental Science and Engineering Department,Southwest Forestry University,Kunming 650224,China;
Abstract Based on the indoor experiments,the influences of soil bulk density on distribution and uniformity of soil moisture,NO3--N and NH4 +-N under film hole irrigation with fertilizer liquid free infiltration were studied . The results showed that soil moisture and NH4 +-N decreased around the film hole;NO3--N first increased and then decreased around the film hole;the lager the soil bulk density was,the smaller the distribution distance of soil moisture,NO3--N and NH4 +-N in horizontal and vertical direction were,and the smaller the accumulative infiltration quantity of fertilizer liquid was . The lager the soil bulk density was,the smaller the uniformity coefficient of soil moisture and NO3--N were,but the lager the uniformity coefficient of NH4 +-N was .The results lay a foundation for further research of film hole fertilizer liquid irrigation technology .
TUO Yun-fei,WANG Ke-qin,ZHANG Zhen-wei,FEI Liang-jun,HU Bing-hui. Influence of soil bulk density on distribution and uniformity of water and nitrogen under film hole irrigation with fertilizer liquid free infiltration. Journal of Zhejiang University: Agric. & Life Sci., 2010, 36(6): 650-656.
