华北农学报2025，Vol.40Issue(5)：127-133,7.DOI:10.7668/hbnxb.20195573
施氮量对宁夏引黄灌区水稻产量及土壤肥力的影响
Effects of Nitrogen Fertilization Rate on Rice Yield and Soil Fertility in the Yellow River Irrigation Area of Ningxia
摘要
Abstract
In order to study the effects of different nitrogen application rates on rice yield,nitrogen uptake and soil fertility,the effects of different nitrogen application levels on rice yield,nitrogen use efficiency and soil tillage fertility in the Yellow River Irrigation Area were studied from 2021 to 2023 using rice variety Fuyuan 4 as the test material.Compared with other treatments,the average yield of 360 kg/ha was 9.4 t/ha,which was 182.94％higher than that of no nitrogen treatment,and 40.72％and 26.34％higher than that of 210,240 kg/ha.From the perspec-tive of yield components,the increase in yield was mainly due to the increase of grain number per spike and the number of effective spikes,and excessive nitrogen application would cause the decrease of 1000-grain weight.The average of the 3-year results showed that the nitrogen use efficiency was up to 26.93％with 240 kg/ha of nitrogen,and the partial productivity of nitrogen fertilizer decreased with the increase of nitrogen application rate.The highest average value of organic matter was 18.60 g/kg after nitrogen application of 210 kg/ha.Compared with the non-ni-trogen application treatment,the soil total nitrogen content of each nitrogen application treatment increased by 7.61％—15.67％,and the soil total nitrogen content of the 360 kg/ha nitrogen application treatment decreased with the increase of the experimental year.The total phosphorus content of soil was gradually reduced in the 360 kg/ha nitrogen application treatment,and the total phosphorus content in other nitrogen application treatments was main-tained at about 0.85 g/kg.The total potassium content of nitrogen fertilization treatments gradually decreased with the increase of nitrogen application rate,and the total potassium content of the 360 kg/ha nitrogen application treat-ment decreased by 23.74％,22.16％and 8.85％,respectively,compared with the nitrogen fertilization treatments of 120,210 and 240 kg/ha.Soil available phosphorus increased with the years of the experiment,and the variation range between treatments increased with time.With the increase of nitrogen application rate,soil available phosphor-us increased first and then decreased,and the soil available phosphorus of the 240 kg/ha treatment increased signif-icantly in 2023 compared with other treatments.The soil available potassium of each treatment did not change signif-icantly with the test years.By considering crop yield,nitrogen use efficiency and soil fertility,nitrogen application of 240 kg/ha could balance the environment and production requirements.关键词
水稻/引黄灌区/施氮量/土壤肥力Key words
Rice/Yellow River Irrigation Area/Nitrogen application rate/Soil fertility分类
农业科学引用本文复制引用
王英,刘汝亮,王芳,洪瑜,冒辛平..施氮量对宁夏引黄灌区水稻产量及土壤肥力的影响[J].华北农学报,2025,40(5):127-133,7.基金项目
农业高质量发展和生态保护科技创新示范课题项目(NGSB-2021-13-3-2) （NGSB-2021-13-3-2）
国家自然科学基金项目(U23A20158 （）
U20A20113) （）
宁夏自然科学基金项目(2023AAC03433) （2023AAC03433）
