| Effects of fertilization method on maize growth and soil respiration under plastic\|covered ridge and furrow planting in dry farmland |
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| DOI：10.7606/j.issn.1000-7601.2020.01.11 |
| Key Words: fertilization method dry farming plastic\|covered ridge and furrow planting maize growth characteristics soil respiration |
| Author Name | Affiliation | | XIE Junhong | Gansu Provincial Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Jinbin | Gansu Provincial Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LI Lingling | Gansu Provincial Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHOU Yongjie | Gansu Provincial Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Linlin | Gansu Provincial Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | QI Peng | Gansu Provincial Key Laboratory of Arid Land Crop Science, Lanzhou, Gansu 730070, China
College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| For maize production under plastic\|covered ridge and furrow planting, a serious issue was undiversified fertilization with deficient theoretical base for carbon emission reduction. Therefore, a filedstudy was conducted to determine the impacts of different fertilization practices on maize growth, grain yield, soil respiration and carbon emission. The experimental design consisted of a zero N control (CK) and three fertilizer practices with the same N amount, i.e. chemical fertilizer (N), chemical fertilizer in combination with organic fertilizer (NM), and organic fertilizer (M). The results showed that soil respiration rate increased at early growth stages while declined at late growth stages. The peak of soil respiration was revealed at flowering stage of maize, and the value is 5.38 μmol·m-2·s-1. The total carbon emission was positively correlated with dry matter, crop growth rate, leaf area index and net assimilation rate.There were no significant difference in yield, total carbon emission and carbon emission efficiency between chemical fertilizer and chemical fertilizer combination with organic fertilizer. Compared to control, the grain yield, total carbon emission, and carbon emission efficiency of chemical fertilizer increased by 151.4%,31.9%, and 92.9%.Similarly, that of chemical fertilizer in combination with organic fertilizer increased by 121.2%,41.9%, and 54.5%, respectively. This indicated that chemical fertilizer in combination with organic fertilizer increased carbon emission in the growing season, but it improved yield of maize, thus, enhanced carbon emission efficiency. |
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