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- Title
化肥减氮配施氨基酸肥料对春玉米生产的影响.
- Authors
胡开博; 杨清夏; 李扬; 吴开贤; 赵平; 龙光强
- Abstract
In order to explore the effect of application of amino acid fertilizer on spring maize cultivation under nitrogen reduction, a field plot experiment was conducted with 6 treatments: N0, no nitrogen applied; U100, conventional N rate, 250 kg·hm-2; U80, N reduction by 20% compared with U100; U60, N reduction by 40% compared with U100; A80, application of amino acid fertilization based on U80; A60, application of amino acid fertilization based on U60. The yield, and main physiological characteristics at tasseling period, nitrogen uptake and utilization of maize at maturity period under different treatments were determined. It was shown that compared with U100, N reduction rate of 20% (U80 and A80 treatments) did not significantly decrease maize yield, yet significantly (P<0.05) increased nitrogen use efficiency by 35.8%-38.8% and harvest index by 41.8%-57.2%. When N reduction rate was 40%, maize yield was significantly (P<0.05) decreased by 20.6% under U60 treatment as compared with U100, yet maize yield was not significantly changed under A60 treatment. Besides, the nitrogen use efficiency was significantly (P<0.05) increased by 30.0% under A60 treatment as compared with U100. However, A60 and U60 treatments had no significant effect on harvest index of maize as compared with U100. Under the same N reduction rate, the intracellular CO2 concentration, chlorophyll content (SPAD value), photosynthetic nitrogen use efficiency, and activities of glutamic oxaloacetic transaminase and glutamate dehydrogenase under A80 treatment were significantly (P<0.05) elevated as compared with U80 treatment, and the transpiration rate and activities of glutamine synthetase and glutamate synthase were significantly (P<0.05) elevated under A60 treatment as compared with U60 treatment. Thus, it was concluded that N reduction rate of 20% would not decrease maize yield based on the conventional N rate under the experiment conditions. Under the same N rate, application of amino acid fertilizers would further increase nitrogen use efficiency.
- Subjects
ASPARTATE aminotransferase; GLUTAMATE dehydrogenase; GLUTAMINE synthetase; AMINO acids; CORN; GLUTAMIC acid
- Publication
Acta Agriculturae Zhejiangensis, 2022, Vol 34, Issue 4, p661
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.2022.04.01