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| Effects of different fertilization schemes on soil ammonia volatilization during flowering cabbage growth in south China |
| Received:June 25, 2021 |
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| KeyWord:nitrogen fertilizer dosage;fertilization scheme;ammonia volatilization;flowering cabbage;yield |
| Author Name | Affiliation | E-mail | | ZHAO Rui | South China Institute of Environment Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China | | | FENG Yanhui | South China Institute of Environment Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China | | | MA Qianli | South China Institute of Environment Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China | | | YAO Lingai | South China Institute of Environment Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China | yaolingai@scies.org | | GAO Jiaqian | Guangdong Tianhe Agricultural Means of Production Co., Ltd., Guangzhou 510080, China | | | ZHAO Xuemin | South China Institute of Environment Sciences, Ministry of Ecology and Environment, Guangzhou 510655, China | |
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| Abstract: |
| To evaluate soil ammonia volatilization and propose a fertilization scheme for reducing ammonia volatilization and ensuring flowering cabbage yield, an experiment was conducted in a typical vegetable field in Huangpu District of Guangzhou City. Using flowering cabbage as the test material, the nitrogen application rate was set as group A, and four nitrogen application levels were set, namely, A0(0), A1(337.5 kg·hm-2), A2(200 kg·hm-2), and A3(140 kg·hm-2). Concurrently, the fertilization method was set as group B, and the three nitrogen application types were set, namely furrow covering soil(B1), surface spraying(B2), and post spraying irrigation(B3). An aeration method was used to measure the ammonia volatilization, and the Chinese cabbage yield was investigated at maturity and after maturity. Results showed that the ammonia volatilization was mainly from topdressing, accounting for 60%~81% of total ammonia volatilization during the whole growth period. Ammonia volatilization was positively proportional to nitrogen application. The ammonia volatilization rate was higher at the initial fertilization stage with different nitrogen applications. Under the same nitrogen application level, the ammonia volatilization accumulation showed the following order:surface fertilizer application > furrow soil covering > irrigation after spraying. Under each nitrogen application treatment, the yield of flowering cabbage was similar, without significant difference. Our results indicate that furrow soil covering application plus 30% reduction in nitrogen application rate has no significant effect on the yield of flowering cabbage in south China; At the same time, compared with the normal-using nitrogen treatment A2B1 and A2B2, it can also reduce the ammonia volatilization loss by 5.9 kg·hm-2 and 29.3 kg·hm-2,respectively. |
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