GUO Luhang, WANG Hepeng, LI Yan, et al. Accumulation Characteristics and Influencing Factors of Soil Nitrate Nitrogen in Vineyard in Piedmont Plain of Taihang Mountain, Hebei Province[J]. 2022, 36(3): 280-285.
DOI:
GUO Luhang, WANG Hepeng, LI Yan, et al. Accumulation Characteristics and Influencing Factors of Soil Nitrate Nitrogen in Vineyard in Piedmont Plain of Taihang Mountain, Hebei Province[J]. 2022, 36(3): 280-285. DOI: 10.13870/j.cnki.stbcxb.2022.03.040.
Accumulation Characteristics and Influencing Factors of Soil Nitrate Nitrogen in Vineyard in Piedmont Plain of Taihang Mountain, Hebei Province
In order to further understand the distribution characteristics and influencing factors of nitrate inorchard soil under farmers' production practice conditions
in this study
the production and management status of 28 orchards in Baoding area of Taihang Mountain piedmont plain in Hebei Province were investigated. The content
accumulation and main influencing factors of nitrate nitrogen in soil of 31vineyards and adjacent farmland from 0 to 200 cm were determined and analyzed. The results showed that the nitrogen application rate was relatively high in grape production
with an average of 297 kg/hm2 per season. Excessive nutrient input resulted in nitrogen accumulation in the soil
and nitrate leaching was obvious in 0-200 cm soil layer
with the accumulation up to 1 555 kg/hm2. Soil nitrate content varied at different tree ages
nitrogen application rates and irrigation amount
but all showed a tendency to increase with the increase of soil depth
and was significantly higher than that of farmland soil. The correlation analysis showed that the nitrate accumulation was positively correlated with the tree age and the nitrogen application rate
but negatively correlated with the irrigation amount. Path analysis showed that the nitrogen application rate was the most influential factor on soil nitrate accumulation
followed by the tree age and fertilization times
and finally the irrigation amount. The number of fertilization mainly affected nitrate accumulation indirectly through the effect of nitrogen application rate. In conclusion
the nitrogen surplus of vineyards in this region was serious
and a large amount of soil nitrate nitrogen was accumulated and leaching into the deep soil. The main factors affecting nitrate nitrogen accumulation in this region were nitrogen application rate
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