| Nitrogen release dynamics of PAL fertilizer and its effects on economic characters and yield of barley |
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| DOI：10.7606/j.issn.1000-7601.2006.05.16 |
| Key Words: PAL fertilizer NH+4-N NO-3-N barley |
| Author Name | Affiliation | | GUO Quan-en | Soil and Fertilizer Institute GAAS,Lanzhou 730070,China；College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China | | GUO Tian-wen | Soil and Fertilizer Institute GAAS,Lanzhou 730070,China | | WANG Yi-quan | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China | | LIU Jun | College of Resources and Environment Northwest A＆F University,Yangling,Shaanxi 712100,China | | NAN Li-li | College of Grass Science Gansu Agricultural University,Lanzhou 730070,China | | CAO Fa-kui | Gansu Kaixi Eco-environment Engineering Corporation,Lanzhou 730000,China | | WU Tian-yun | Soil and Fertilizer Institute GAAS,Lanzhou 730070,China |
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| Abstract: |
| A pot experiment was conducted to study the nitrogen release dynamics of a PAL fertilizer and its effects on economic characters and yield of barley．It was observed that there was no significant difference in NH+4-N release between PAL fertilizer and urea treatment．The trend of NO-3-N release was similarly “S” type curve and there was a very significant difference．During the whole growth period of barley there were two stages of nitrogen release from PAL fertilizer：the first stage was 0～14 d and the second stage was 28～42 d after applied．The function of nitrogen release from PAL fertilizer was satisfied with the nutrient demand of crop．Under the same nitrogen level the yield of barley treated with PAL fertilizer was higher than that with urea．In the range of 0～7kg／667m2 as the nitrogen levels ascended the yield of barley increased；in the range of 7～14kg／667m2 as the nitrogen levels ascended the yield of barley descended. |
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