ZHANG Jinping, CHEN Zhaoming, WANG Qiang, et al. Effect of Slow-release Nitrogen Ratio on Growth and Nitrogen Utilization of Single-cropping Late Rice with One-time Fertilization[J]. 2021, 35(6): 207-212.
DOI:
ZHANG Jinping, CHEN Zhaoming, WANG Qiang, et al. Effect of Slow-release Nitrogen Ratio on Growth and Nitrogen Utilization of Single-cropping Late Rice with One-time Fertilization[J]. 2021, 35(6): 207-212. DOI: 10.13870/j.cnki.stbcxb.2021.06.028.
Effect of Slow-release Nitrogen Ratio on Growth and Nitrogen Utilization of Single-cropping Late Rice with One-time Fertilization
To test the appropriate proportion of slow-release nitrogen (N) to the total N application in the one-time application strategy for single-cropping rice
to provide theoretical guidance for efficient fertilization of single-cropping late rice
a field experiment was carried out in Heping Town
Changxing County
Zhejiang Province from 2019 to 2020. The experiment consisted of six treatments: (1) No N fertilizer (N0); (2) Conventional fertilization (U1
base fertilizer∶tillering fertilizer∶panicle fertilizer=4∶3∶3); (3) Reduction conventional N rate by 12.5% (U2
the proportion was the same as U1); (4) 57% slow-release N with one-time application (SRU1); (5) 45% slow-release N with one-time application (SRU2); (6) 34% slow-release N with one-time application (SRU3). The N application rate was 240 kg/hm2 for U1
and 210 kg/hm2 for U2 and SRU. The rice yield
nutrient uptake
nutrient utilization efficiency
ammonium N content in-field water
and ammonia volatilization were measured. The results showed that the yield of single cropping rice in N0 was 73.55% of that in U. Compared with U
one-time application of slow-release N fertilizer could maintain rice yield. The yield of single cropping rice tended to increase with the increase of the proportion of slow-release N application. There was no significant difference in aboveground N content and N uptake between SRU and U. Compared with U
the N use efficiency of SRU2 in 2019 and SRU1 in 2020 increased by 10.49% and 8.84% respectively
reaching the significant difference level
but there was no significant difference between other treatments and U1 and U2. Compared with U
SRU significantly reduced the content of ammonium N and cumulative ammonia volatilization in-field water
but there was no significant difference among slow-release fertilizers. According to the results of related yield and N loss
one-time application of 34% slow-release N application ratio could meet the nutrients requirements of single cropping rice
ensure stable rice yield and reduce N runoff and volatilization loss at the same time.
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Related Author
TIAN Xiu-ying
WANG Zheng-yin
LIU Ruliang1
WANG Fang1
WANG Kaijun2
ZHANG Aiping3
LI Youhong1
HONG Yu1
Related Institution
Institute of Agricultural Resources and Environment, Ningxia Academy of Agro-forestry Science
Fangzheng County Agricultural Technology Extension Service Center, Fangzheng
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science,Key Laboratory of Agriculture Environment and Climate Change, Ministry of Agriculture, Agricultural Clean Watershed Innovation Team
School of Agriculture, Ningxia University
College of Resources and Environment, Anhui Agricultural University