| 松嫩平原秸秆还田对连作春玉米氮素供应与吸收的影响 |
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| 引用本文： | 高杰,于舒函,李二艳,于雷,马春梅.松嫩平原秸秆还田对连作春玉米氮素供应与吸收的影响[J].核农学报,2021,35(1):183-191. |
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| 作者姓名： | 高杰 于舒函 李二艳 于雷 马春梅 |
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| 作者单位： | 东北农业大学农学院,黑龙江哈尔滨150030;东北农业大学农学院,黑龙江哈尔滨150030;东北农业大学农学院,黑龙江哈尔滨150030;东北农业大学农学院,黑龙江哈尔滨150030;东北农业大学农学院,黑龙江哈尔滨150030 |
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| 基金项目： | 国家重点研发计划(2016YFD0300803);黑龙江省应用技术研究与开发计划(GA16B401)。 |
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| 摘 要： | 为探明松嫩平原秸秆还田对连作春玉米氮素供应与吸收的影响,在松嫩平原中南部,采用框栽和15N同位素标记的方法,设置5个秸秆还田量,分别为0(CK)、9.20、18.40、27.60和36.80 t·hm-2,均施入15N标记的尿素350 kg·hm-2(纯氮量约160 kg·hm-2),开展秸秆还田试验.结果表明,秸秆还...
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| 关 键 词： | 玉米 秸秆还田 土壤速效氮 氮肥利用率 产量 |
| 收稿时间： | 2019-06-19 |
Effects of Straw Returning on the Supply and Absorption of Nitrogen in Continuous Spring Maize in Songnen Plain |
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| GAO Jie,YU Shuhan,LI Eryan,YU Lei,MA Chunmei.Effects of Straw Returning on the Supply and Absorption of Nitrogen in Continuous Spring Maize in Songnen Plain[J].Acta Agriculturae Nucleatae Sinica,2021,35(1):183-191. |
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| Authors: | GAO Jie YU Shuhan LI Eryan YU Lei MA Chunmei |
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| Institution: | College of Agriculture, Northeast Agricultural University, Harbin, Heilongjiang 150030 |
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| Abstract: | To explore effects of straw returning on the supply and absorption of nitrogen in continuous spring maize in Songnen Plain,the experiment set five straw treatments of 0 t·hm-2(CK),9.20 t·hm-2,18.40 t·hm-2,27.60 t·hm-2and 36.80 t·hm-2in the south-central Songnen Plain.All were applied with urea15N labeled 350 kg·hm-2.The results showed that returning straw to the field changed the utilization rate of spring maize to fertilizer nitrogen and soil nitrogen.Under a certain amount of straw returning,as the amount of straw returning to the field increased,the proportion of fertilizer nitrogen in the nitrogen accumulation of spring maize plants increased,but the opposite trend after the jointing stage.Through equation fitting,when the amount of straw returned to the field was lower than 12.49 t·hm-2,the utilization rate of nitrogen fertilizer in the season could be improved,and when it was higher than 12.49 t·hm-2,the utilization rate of nitrogen fertilizer was lower than that of CK.Straw returning to the field was not conducive to the growth of spring maize at the seedling stage and jointing stage.When the amount of straw returned to the field was 11.25 t·hm-2,it was the most favorable for the formation of spring maize yield.When the amount of straw returned to the field was higher than 23.96 t·hm-2,it would cause a reduction in yield.From the results of this experiment,it could be speculated that the optimal amount of straw returning to the field was 11.25 t·hm-2when combined with 350 kg·hm-2of urea in the central and southern Songnen Plain.This experiment systematically studied the effects of different maize straw returning fields on soil nitrogen supply and nitrogen absorption of next crop maize,which provides a basis and reference for scientific analysis of the relationship between straw returning and soil nitrogen supply. |
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| Keywords: | maize straw returning soil available nitrogen nitrogen use efficiency yield |
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