宁波市农业科学研究院生态环境研究所,浙江,宁波,315040
纸质出版:2020
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金树权, 陈若霞, 汪峰, 等. 不同氮肥运筹模式对稻田田面水氮浓度和水稻产量的影响[J]. 水土保持学报, 2020,34(1):242-248.
JIN Shuquan, CHEN Ruoxia, WANG Feng, et al. Effects of Different Nitrogen Fertilizer Application Modes on the Variation of Nitrogen Concentration in Paddy Field Surface Water and the Yield of Rice[J]. 2020, 34(1): 242-248.
金树权, 陈若霞, 汪峰, 等. 不同氮肥运筹模式对稻田田面水氮浓度和水稻产量的影响[J]. 水土保持学报, 2020,34(1):242-248. DOI: 10.13870/j.cnki.stbcxb.2020.01.035.
JIN Shuquan, CHEN Ruoxia, WANG Feng, et al. Effects of Different Nitrogen Fertilizer Application Modes on the Variation of Nitrogen Concentration in Paddy Field Surface Water and the Yield of Rice[J]. 2020, 34(1): 242-248. DOI: 10.13870/j.cnki.stbcxb.2020.01.035.
通过构建包括不同氮肥类型、氮肥用量、施肥方式和施肥次数的6种氮肥运筹模式,分析了不同氮肥运筹模式对稻田田面水各形态氮浓度变化和水稻产量的影响。结果表明:不同时期施用缓控释肥和尿素后,总氮和铵态氮浓度均在1天达到峰值,硝态氮浓度在2~3天达到峰值,之后逐渐下降趋于稳定。铵态氮为各处理施肥后初期的主要氮形态,1天时铵态氮占总氮比例达50.6%~92.8%,而硝态氮仅占3.8%~22.6%。田面水总氮和铵态氮峰值浓度大小与氮肥类型、施用用量和施肥方式均存在相关性,等氮量施用条件下,田面水总氮和铵态氮峰值浓度大小顺序为撒施尿素处理 > 撒施缓控释肥处理 > 侧深施缓控释肥处理,在N施用量48 kg/hm2条件下,撒施尿素处理、撒施缓控释肥处理、侧深施缓控释肥处理的总氮和铵态氮平均峰值浓度分别为38.44,16.44,7.55 mg/L和34.39,13.00,3.82 mg/L。等氮施用量和相同施肥次数条件下,基肥采用侧深施缓控释肥的处理4,5,6比相应的撒施缓控释肥的处理1,2,3的产量分别提高2.8%,3.5%,2.7%。基肥采用侧深施缓控释肥和"-基-穗"2次施肥的处理6的水稻产量,在氮肥总施用量减少30%条件下,仅比基肥采用撒施缓控释肥和"-基-蘖-穗"3次施肥的处理1的水稻产量减少0.3%。侧深施缓控释肥可以有效降低施肥初期田面水铵态氮峰值浓度,从而减少氨挥发和降低径流流失风险,并在-定程度减量条件下不会对水稻产量产生影响。
The effects of different nitrogen application modes on the variation of nitrogen concentrations in paddy field surface water and rice yield were analyzed
through constructing six nitrogen application modes with different fertilizer types
fertilizer amounts
fertilization modes and times. The results showed that after slow-controlled fertilization and urea application
the concentration of total nitrogen and ammonuim reached peak in 1 day
and the concentration of nitrate reached peak in 2~3 days
and then gradually decreased to a stable level. Ammonium nitrogen was the main form of nitrogen in the initial stage after fertilization
and the proportaion of ammonium nitrogen in total nitrogen concentration reached 50.6%~92.8% in 1 day
while nitrate nitrogen only accounted for 3.8%~22.6%. The peak concentration of total nitrogen and ammonium nitrogen in surface water was correlated with fertilizer type
fertilizer amount and fertilization mode. Under the condition of equal nitrogen fertilization
the order of peak concentration of total nitrogen and ammonium nitrogen in surface water was as follows:Spraying urea treatment > spraying slow-release fertilizer treatment > side-deep application of slow-release fertilizer treatment. Under 48 kg/hm2 N fertilization condition
the average peak concentrations of total nitrogen and ammonium nitrogen in the treatments of spraying urea
spraying slow-release fertilizer
and side-deep application of slow-release fertilizer were 38.44
16.44
7.55 mg/L
and 34.39
13.00 and 3.82 mg/L
respectively. Under the same amount of nitrogen application and times of fertilization
the yields of treatments 4
5
and 6 with side-deep slow-release fertilizer were 2.8%
3.5%
and 2.7% higher than those of treatments 1
2 and 3 with corresponding spraying slow-release fertilizer
respectively. Under the condition that the total amount of nitrogen fertilizer was reduced by 30%
the yield of rice of treatment 6 with side-deep application of slow-release fertilizer during base fertilizer period and two-times fertilization only decreased by 0.3% compared with that treatment 1 with spraying slow-release fertilizer during base fertilizer period and three-times fertilization. The results showed that side deep application of slow-release fertilizer could effectively reduce the peak concentration of ammonium nitrogen in surface water at the initial stage of fertilization
thus reducing the risk of ammonia volatilization and runoff loss
and would not affect rice yield under certain reduction conditions.
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