| Effects of organic materials returning and nitrogen fertilizer reduction on nitrogen utilization and economic benefits of wheat |
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| DOI：10.7606/j.issn.1000-7601.2019.06.31 |
| Key Words: organic materials returning wheat reducing nitrogen fertilizer nitrogen utilization efficiency economic benefit |
| Author Name | Affiliation | | LI Chunxi | College of Life Sciences, Henan Normal University, Xinxiang, Henan 453007, China | | LIU Qing | College of Life Sciences, Henan Normal University, Xinxiang, Henan 453007, China | | SHAO Yun | College of Life Sciences, Henan Normal University, Xinxiang, Henan 453007, China | | MA Shouchen | School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China | | LI Sisi | College of Life Sciences, Henan Normal University, Xinxiang, Henan 453007, China | | LI Xiaobo | College of Life Sciences, Henan Normal University, Xinxiang, Henan 453007, China | | WENG Zhengpeng | College of Life Sciences, Henan Normal University, Xinxiang, Henan 453007, China |
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| Abstract: |
| To study the effects of organic material returning and nitrogen (N) fertilizer reduction on wheat N use efficiency and economic benefits, 10 field experiments were designed in this research. Conventional single N fertilizer was used as control (CK), and three kinds of organic materials (straw, cattle manure, mushroom residue) were chosen to add in field with various N application levels (90%, 80%, 70% pure N of CK). The results indicated that the treatment of organic material returning increased grain yield by 1.90%~69.64% over CK. The yields of wheat under treatments ranked as JZ>JF>J>CK. Under JZ treatment, the highest yield of wheat was at N1 level, which was 10 478.04 kg·hm-2. Under JF treatment, the wheat yield at N3 level was 8 113.05 kg·hm-2. Under J treatment, the highest wheat yield was at N2 level, which was 8 138.14 kg·hm-2, which increased by 69.64%, 31.35% and 31.76%, respectively, compared with that of CK. The economic benefits of wheat under each treatment and the net economic return after removing environmental costs ranked as JZ>J>JF>CK, and the highest were JZN1, JN2 and JFN3, respectively. Compared with CK, the economic benefits of JZN1, JN2 and JFN3 increased by 123.49%, 59.35% and 37.72%, respectively. Meanwhile, the net economic benefits increased by 186.41%, 96.35% and 71.94%, respectively, compared with that of CK. In summary, reducing nitrogen fertilizer application under the condition of returning organic materials to field significantly increased N use efficiency of wheat, which also increased wheat yield. Thereby, the economic benefits of wheat fields and net economic benefits after removing environmental costs would be increased. |
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