Effects of Natural Rainfall and Application of Slow-release Fertilizers on Nitrogen and Phosphorus Runoff Loss in the Upper Beiyun River Watershed

doi:10.11924/j.issn.1000-6850.casb2023-0217

Abstract

Abstract:

A field monitoring experiment was conducted to study the effects of non-fertilization (T₁), traditional fertilization (T₂) and slow-release fertilization (T₃) on nitrogen and phosphorus runoff loss during maize growing season in the upper reaches of the Beiyun River watershed. The results showed that when the rainfall exceeded 30 mm in 12 hours, the soil water content was saturated, and the surface runoff was produced, and if the rainfall exceeded 30 mm in 1 hour, the runoff would be intensified. Compared with T₂ treatment, T₃ treatment had lower TN, TP, ammonium N and nitrate N loss by 15.3%, 24.2%, 10% and 12%, respectively, but there was no significant difference. The TN loss rate of T₃ treatment was 0.07%, which was 46.2% less than that of T₂ treatment, the TP loss rate of T₃ treatment was 0.13%, which was 71.7% less than that of T₂ treatment, and the nitrate N loss rate of T₃ treatment was 0.06%, which was 25% less than that of T₂ treatment. In conclusion, compared with traditional fertilization, the application of slow-release fertilizer could reduce the loss of nitrogen and phosphorus, which provided data support for scientific promotion of slow-release fertilizer and evaluation of the effect of slow-release fertilizer on the loss of nitrogen and phosphorus.

Key words: natural rainfall, slow-release fertilizer, Beiyun River watershed, runoff, nitrogen and phosphorus loss

LIU Zifei, LI Hongbo, TAO Zengjiao, HUO Shanshan, ZHANG Lei, YAN Fang, WU Wenqiang, WANG Shengtao. Effects of Natural Rainfall and Application of Slow-release Fertilizers on Nitrogen and Phosphorus Runoff Loss in the Upper Beiyun River Watershed[J]. Chinese Agricultural Science Bulletin, 2024, 40(5): 74-79.

Figures/Tables 6

References 26

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处理	基肥（种肥同播）		追肥（表层撒施）		氮磷养分投入量
处理	品种	用量	品种	用量	N	P₂O₅
T₁	—	—	—	—	0	0
T₂	复合肥	495	尿素	132	150	60
T₃	缓释肥	600	—	—	150	60

处理	基肥（种肥同播）		追肥（表层撒施）		氮磷养分投入量
处理	品种	用量	品种	用量	N	P₂O₅
T₁	—	—	—	—	0	0
T₂	复合肥	495	尿素	132	150	60
T₃	缓释肥	600	—	—	150	60