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| Effects of different fertilization treatments on runoff losses of nitrogen and phosphorus in paddy fields in Erhai Lake basin, China |
| Received:November 09, 2020 |
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| KeyWord:Erhai Lake basin;fertilization pattern;paddy field;runoff;N and P loss;yield |
| Author Name | Affiliation | E-mail | | JIANG Hai-bin | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China | | | SHEN Shi-zhou | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China | | | GU Yan-ru | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China | | | YU Shuang | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | | | ZOU Hong-tao | College of Land and Environment, Shenyang Agriculture University, Shenyang 110866, China | | | Arif Husain | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China | | | ZHANG Lei | Dali Agricultural Environmental Protection Monitoring Station, Dali 671000, China | | | ZHANG Ke-qiang | Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
Dali Observation and Experimental Station of National Agricultural Environment, Dali 671004, China | keqiangzhang68@163.com |
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| Abstract: |
| To explore the rice planting fertilization mode in Erhai Lake basin and reduce runoff losses of nitrogen and phosphorus in paddy fields, this study investigated the effects of different fertilization treatments through field plot experiments. Results showed that the total phosphorus（TP）concentration in the T6 runoff was significantly higher than that of other fertilization treatments. The TP concentration in the T4 runoff was significantly higher than the other fertilization treatments. The total nitrogen（TN）loss of the chemical fertilizer reduction pattern（T1）exhibited no significant difference as compared to the conventional fertilization pattern（CF）, while the TN loss of the organic fertilizer replacement patterns（T2~T5）decreased by 31.6%~40.4%. The slow and controlled release fertilizer pattern（T6）decreased by 15.7%. Compared to the CF, the TP losses of T1, T4, and T6 increased by 16.3%, 57.0%, and 45.3%, respectively. There was no significant difference in the TP losses between T2 and the CF. The grain yields of T1 and T2~T5 decreased by 9.5% and 11.8%~42.9%, respectively, compared to the CF. The grain yield of T6 did not differ significantly from the CF. Moreover, there were no significant differences in straw yields of the CF, T1, T4, and T6, whereas compared to the CF, the T2, T3, and T5 straw yields decreased by 15.5%, 16.0%, and 36.0%,respectively. Considering the runoff losses and rice yields of the different fertilization patterns and the loss of the chemical fertilizer reduction pattern（T1）, the combined application of organic and inorganic fertilizer patterns（T3 and T5）and the slow/controlled-release fertilizer pattern （T6）are more environmentally-friendly fertilization models for paddy fields in Erhai Lake basin. |
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