| Autor: |
LI Shuai, WEI Qi, XU Junzeng, WANG Haiyu, ZHOU Jiaoyan |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Guan'gai paishui xuebao, Vol 40, Iss 10, Pp 79-86 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1672-3317 |
| DOI: |
10.13522/j.cnki.ggps.2021234 |
| Popis: |
【Objective】 Nitrogen (N) loss from paddy fields is an environmental concern in rice production in the south of China. How to improve N use efficiency and alleviate its loss is an important issue in developing sustainable agriculture. The purpose of this paper is to investigate the feasibility of controlled fertigation to achieve this. 【Method】 The experiment was conducted in a paddy field and nitrogen fertilizer was applied at the panicle stage. We compared two fertilizations: conventional fertilization topdressing 367 kg/hm2 of N fertilizer, and reduced fertilization topdressing 267 kg/hm2 of N fertilizer (R). For each fertilization, the N fertilizer was either applied by hand-broadcasting (H), or through fertigation applied with irrigation. In each treatment, we measured N distribution in soil, rice growth and yield. 【Result】 ① Depending on N fertilization rate, the fertigation increased ammonium and nitrate contents in the soil by 27.4%~50.7% and 15.2%~33.3% respectively (p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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