| The effects of slow-release urea on soil and plant nitrogen content，dry matter and yield of maize |
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| DOI：10.7606/j.issn.1000-7601.2018.05.15 |
| Key Words: slow-release urea maize soil nitrogen dry matter N uptake |
| Author Name | Affiliation | | WU Peng | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | YANG Ke-jun | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | WANG Yu-feng | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | ZHANG Yi-fei | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | ZHANG Wen-chao | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | WU Qiong | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | CHEN Tian-yu | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | ZHANG Peng-fei | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | PANG Chen | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | WANG Huai-peng | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | YIN Xue-wei | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China | | YANG Li | College of Agronmy, Heilongjiang Bayi Agricultural University/Heilongjiang Provincial Key Laboratory of Modern Agricultural Cultivation and Crop Germplasm Improvement, Daqing, Heilongjiang 163319, China |
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| Abstract: |
| The field experiment based on the identical fertilizer, urea (pure N 60 kg·hm-2) , phosphorus (P2O5 120 kg·hm-2) and potassium (K2O 90 kg·hm-2) into 8 cm soil below the maize seed as seeding-fertilizer and fertilized various types of slow-release urea(pure N 160 kg·hm-2) into the soil before jointing stage. Four treatments, I(resin coated urea, A), II (sulfur coated urea, B), III(vegetable oil coated urea) and IV(common urea,CK) were set in the experiment. The spatial-temporal variations of soil NO-3-N, NH+4-N and total N in depth of 0~20 cm and the dry matter and nitrogen content of the Plant organs were measured. Comparing to common urea of the same N application rate, the slow-release urea (A, B, C) could increase the content of soil NO-3-N, NH+4-N in later days. The slow-release urea (A, B, C) increased soil NO-3-N by 5.50, 5.93 and 2.04 mg·kg-1 respectively, increased soil NH+4-N by 8.19, 2.31 and 1.85 mg·kg-1 respectively and increased soil total nitrogen by at maize filling stage. Similarly, they increased soil NO-3-N by 5.50, 5.93 and 2.04 mg·kg-1 respectively, increased soil NH+4-N by 7.12, 3.39 and 1.02 mg·kg-1 respectively at maize harvesting stage. Soil total N was increased by 0.22, 0.11 and 0.05 mg·kg-1 respectively at maize filling stage and was incresed by 0.20, 0.20 and 0.01 mg·kg-1 respectively at maize harvesting stage. The slow-release urea(A, B,C) increased the dry matter 89.41, 60.92 and 48.97g/individual respectively and the accumulation of nitrogen was incresed by 73.12, 51.60 and 34.84 kg·hm-2 respectively at harvesting stage. The accumulation of N on maize grain increased by 56.98, 43.58 and 29.36 kg·hm-2 respectively. The maize yield were increased by 2.22%～18.82%. Comparing to the other slow-release urea, resin coated urea had a better efficiency. |
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