Effects of controlled-release mixed fertilizer on ammonia volatilization and fertilizer nutrient recovery rate of double maize cropping system

doi:10.14088/j.cnki.issn0439-8114.2022.21.011

Abstract

Abstract: In order to reduce ammonia volatilization and improve nutrient utilization efficiency, the experiment was conducted to study the effects of controlled-release mixed fertilizer on ammonia volatilization and nutrient utilization efficiency by setting conventional fertilization treatments （simple matter fertilizer and compound fertilizer） and controlled-release mixed fertilizer treatments （20% less nitrogen than conventional fertilization, 50%, 70% and 100% controlled-release urea）, with “grain maize in spring-silage corn in autumn” as planting system and no fertilization as control. The results showed that the yield of grain maize and silage corn under all fertilization treatments was significantly higher than that of the control treatment, and there were no significant differences in the yield of grain maize and silage corn among different fertilization treatments. Ammonia volatilization occured mainly within 30 days after fertilization in grain maize season and within 15 days after fertilization in silage corn season. The peak of ammonia volatilization in silage corn season was significantly higher than that of grain maize season. The ammonia volatilization of compound fertilizer was lower than that of simple fertilizer; there was no obvious difference among different treatments of the controlled-release mixed fertilizer, and the ammonia volatilization was lowest in CF3 treatment. The nitrogen recovery rates of grain maize from high to low were CF1, CF3, CF2, CG2 and CG1. Considering the yield, ammonia volatilization, nitrogen recovery rate and cost, the suitable fertilization ratio was N, P₂O₅, K₂O of 168,105,150 kg/hm², and controlled-release urea accounting for 50% in the “grain maize in spring-silage corn in autumn” system in Jianghan Plain.

Key words: grain maize, silage corn, controlled release mixed fertilizer, ammonia volatilization

CLC Number:

S513
S14-33

XU Xiang-yu, ZHOU Jian-xiong, YU Da-zhao, XIANG Li-bo, YUAN Jia-fu, ZHENG Lei, ZHANG Qiang. Effects of controlled-release mixed fertilizer on ammonia volatilization and fertilizer nutrient recovery rate of double maize cropping system[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(21): 62-66.

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