caa a22 4500 477111467 CHVBK 20180405111610.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00015405 doi (NATIONALLICENCE)springer-10.1007/BF00015405 Effects of inorganic nitrogen application on the dynamics of the soil solution composition in the root zone of maize [Elektronische Daten] [Junta Yanai, Denis Linehan, David Robinson, Iain Young, Christine Hackett, Kazutake Kyuma, Takashi Kosaki] The effect of inorganic nitrogen (N) fertilizer on the ionic composition of the soil solution under maize (Zea mays L.) was studied. A pot experiment was carried out with two treatments combined factorially, with or without N application (Ca(NO3)2; +N and −N treatments, respectively), and with or without plants. Three looped hollow fiber samplers were installed in each pot to sample soil solutions nondestructively from the root zone, seven times during the 50-day growth period. Plants were harvested on the 50th day, and their nutrient contents determined. Effects of N fertilizer on the soil solutions were observed by the first sampling, 2 days after sowing. The concentrations of Ca and NO3 − and electrical conductivity (EC) increased significantly in the +N treatments as direct effects of fertilizer application. In addition, the concentrations of Mg, K, Na and H+ also increased and that of P decreased significantly as indirect effects caused by the re-establishment of chemical equilibria. This suggested the greater supply as well as the greater possibility of leaching loss not only of NO3 − but also of Ca, Mg and K. In the treatments with plants, the concentrations of NO3 −, Ca, Mg and K decreased with time and pH increased significantly compared with the unplanted soil. The depletion of N in the soil solution roughly agreed with the amount of N taken up by the plant. The depletions of K from the soil solution amounted to less than 10% of the amount of the K taken up, suggesting intensive replenishment of K from exchange sites in the soil. Depletions of Ca and Mg were several times higher than the amounts taken up, indicating that the depletions resulted from the adsorption of the divalent cations by the soil rather than uptake by plants. Because NO3 − is hardly absorbed by exchange sites in soil and was the dominant anion in solution, it was concluded that NO3 − had a major role in controlling cation concentrations in the soil solution and, consequently, on their availability for uptake by plants as well as their possible leaching loss. ei]H Marschner Kluwer Academic Publishers, 1996 maize nationallicence nitrate nationallicence nitrogen fertilizer nationallicence root zone nationallicence soil solution nationallicence soil solution sampler with looped hollow fiber (LHF-sampler) nationallicence Zea mays L nationallicence Yanai Junta Faculty of Agriculture, Kyoto University, 606-01, Kyoto, Japan aut Linehan Denis Cellular and Environmental Physiology Department, Scottish Crop Research Institute, DD2 5Da, Dundee, UK aut Robinson David Cellular and Environmental Physiology Department, Scottish Crop Research Institute, DD2 5Da, Dundee, UK aut Young Iain Cellular and Environmental Physiology Department, Scottish Crop Research Institute, DD2 5Da, Dundee, UK aut Hackett Christine Biomathematics and Statistics Scotland, Scottish Crop Research Institute, DD2 5DA, Dundee, UK aut Kyuma Kazutake Faculty of Agriculture, Kyoto University, 606-01, Kyoto, Japan aut Kosaki Takashi Faculty of Agriculture, Kyoto University, 606-01, Kyoto, Japan aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 180/1(1996-03-01), 1-9 0032-079X 180:1<1 1996 180 11104 https://doi.org/10.1007/BF00015405 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00015405 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yanai Junta Faculty of Agriculture, Kyoto University, 606-01, Kyoto, Japan aut NATIONALLICENCE 700 1- Linehan Denis Cellular and Environmental Physiology Department, Scottish Crop Research Institute, DD2 5Da, Dundee, UK aut NATIONALLICENCE 700 1- Robinson David Cellular and Environmental Physiology Department, Scottish Crop Research Institute, DD2 5Da, Dundee, UK aut NATIONALLICENCE 700 1- Young Iain Cellular and Environmental Physiology Department, Scottish Crop Research Institute, DD2 5Da, Dundee, UK aut NATIONALLICENCE 700 1- Hackett Christine Biomathematics and Statistics Scotland, Scottish Crop Research Institute, DD2 5DA, Dundee, UK aut NATIONALLICENCE 700 1- Kyuma Kazutake Faculty of Agriculture, Kyoto University, 606-01, Kyoto, Japan aut NATIONALLICENCE 700 1- Kosaki Takashi Faculty of Agriculture, Kyoto University, 606-01, Kyoto, Japan aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 180/1(1996-03-01), 1-9 0032-079X 180:1<1 1996 180 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer