| Effects of tillage and nitrogen fertilization regimes on main physicochemical properties of soil and crop yield |
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| DOI：10.7606/j.issn.1000-7601.2018.01.28 |
| Key Words: soil tillage patterns nitrogen fertilizer application regimes physical & chemical properties crop yield |
| Author Name | Affiliation | | ZHANG Yu-e | College of Agronomy, Henan Agricultural University, State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, Zhengzhou, Henan 450002, China | | YANG Xi-wen | College of Agronomy, Henan Agricultural University, State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, Zhengzhou, Henan 450002, China | | WANG Yong | Zhumadian Academy of Agricultural Sciences, Zhumadian, Henan 463000, China | | ZHOU Hong-mei | Xiayi Extension Center for Agricultural Techniques, Xiayi, Henan 476400, China | | DU Cong-yang | College of Agronomy, Henan Agricultural University, State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, Zhengzhou, Henan 450002, China | | HE De-xian | College of Agronomy, Henan Agricultural University, State Key Laboratory of Wheat and Maize Crop Science, Collaborative Innovation Center of Henan Grain Crops, Zhengzhou, Henan 450002, China |
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| Abstract: |
| The effects of various tillage practices (including deep tillage and rotary tillage in wheat field, no tillage in maize field) and different nitrogen fertilization (including the rate and method of nitrogen application) on annual variation of soil physical characteristics and crop yield were investigated, by field experiments including fluvo-aquic soil and lime concretion black soil under the condition of winter wheat-summer maize rotation cropping system at the same time. Aikang 58 (wheat) and Zhengdan 958 (maize) were used as the test materials. The results showed that deep tillage decreased the soil bulk density whereas increased the soil porosity and field moisture in 20～40 cm soil layer significantly, and the annual crop yield were increased by 4.30% and 2.63% in both experiments of deep tillage compare to the rotary tillage. Soil total nitrogen and alkali-hydrolyzable nitrogen were with the increase in nitrogen application rate. Soil total nitrogen and alkali-hydrolyzable N increased with the increase in base fertilizer application, and they increased with the increase in nitrogen topdressing rate. Considering the economic benefit, we suggest that deep tillage in winter wheat field and no tillage in summer maize field is the most appropriate tillage methods in both experiments. Nitrogen application rate of 300 kg/hm-2 and the ratio of base to jointing topdressing as 1∶1 in winter wheat and Nitrogen application rate of 240 kg·hm-2 and the ratio of base to jointing topdressing to bell stage as 2∶1∶1 in summer maize was the optimal nitrogen application model in fluvo-aquic soil. And nitrogen application rate of 240 kg·hm-2 as the base fertilizer in winter wheat and nitrogen application rate of 180 kg·hm-2 and the ratio of base to jointing topdressing as 3∶1 in summer maize was the optimal nitrogen fertilization model in lime concretion black soil. |
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