| Interactive effects of water and nitrogen supply on nutrient absorption and utilization of maize seedlings under partial root-zone water stress |
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| DOI：10.7606/j.issn.1000-7601.2010.03.19 |
| Key Words: partial root-zone water stress nitrogen form nitrogen supply position nutrient utilization maize seedling |
| Author Name | Affiliation | | WANG Xuming | School of Life Science，Huaibei Normal University, Key Laboratory of Plant Resources and Biology of Anhui Province, Huaibei, Anhui 235000, China | | ZHANG Zheng | School of Life Science，Huaibei Normal University, Key Laboratory of Plant Resources and Biology of Anhui Province, Huaibei, Anhui 235000, China | | WANG Haihong | School of Life Science，Huaibei Normal University, Key Laboratory of Plant Resources and Biology of Anhui Province, Huaibei, Anhui 235000, China | | ZHU Pengfei | School of Life Science，Huaibei Normal University, Key Laboratory of Plant Resources and Biology of Anhui Province, Huaibei, Anhui 235000, China | | WANG Xin | School of Life Science，Huaibei Normal University, Key Laboratory of Plant Resources and Biology of Anhui Province, Huaibei, Anhui 235000, China | | SHU Liangzuo | School of Life Science，Huaibei Normal University, Key Laboratory of Plant Resources and Biology of Anhui Province, Huaibei, Anhui 235000, China |
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| Abstract: |
| Effects of nitrogen form and its application position on nutrient absorption and utilization of maize seedlings under partial root-zone water stress were examined by using solution culture technique. A split-root system com-posed of two root compartments was used. Polyethylene glycol (PEG6000)was added to one root compartment simulating
partial root-zone water stress. Nitrogen was set as three forms (50% NO3- -N+ 50% NH4- -N; NO3--N; NH4--N) and supplied to just one root compartment (water-stressed or non-water- stressed-compartment). Plant biomass and nutrient concentration were examined when plants were harvested. It showed that, plant growth, total content and incre-ment of N, P, K, Ca, Mg, Fe in plants were improved when nitrogen was supplied to non-water-stressed compartment compared to water-stressed one. Comparing to other nitrogen form, the growth and nitrogen absorption by plants treated with mixed nitrogen were the highest. Supply of nitrate increased absorption and increment of K, Ca, Mg and Fe com-pared to ammonium nutrition. Nutrient use efficiency was oppositely correlated to its concentration in shoot in most case. |
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