| Synergetic effect of plastic film mulching and irrigation quota on yield and yield components of maize |
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| DOI：10.7606/j.issn.1000-7601.2020.06.21 |
| Key Words: maize no\|tillage with plastic mulching irrigation quota crop growth rate dry matter accumulation yield components |
| Author Name | Affiliation | | ZHAO Cai | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CAI Lijuan | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHAI Qiang | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHAO Liangxia | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | Fan Hong | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YIN Wen | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | HU Falong | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YU Aizhong | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FAN Zhilong | Gansu Provincial Key Laboratory of Arid Land Crop Science, Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| n order to evaluate the yield formation mechanism of maize and provide the theoretical and practical basis for integrated use of no\|tillage and limited irrigation, this study investigated dry matter accumulation and yield components response of maize to different plastic film mulching practices (NT: no tillage in fall with mulching and tillage in the next spring; RT: no tillage in fall with mulching and tillage in the next spring; CT: conventional tillage) and various irrigation levels (I1: 450 mm in whole growth period; I2: 495 mm; I3: 540 mm). The results showed that, NT reduced the dry matter accumulation and crop growth rate before tasseling period of maize. Compared to CT, the dry matter accumulation and crop growth rate were decreased by 32.4% and 45.9%. However, after tasseling period, dry matter accumulation and crop growth rate with NT was increased by 7.4% and 32.6%, compared to that of CT. Irrigation reduction at 495 mm didn’t reduce dry matter accumulation and crop growth rate. Compared to CT, the ears number per planting area and hundred\|kernel weight of maize with NT were improved by 13.4% and 6.6%. Consequently, grain yield with NT was increased by 5.4% compared to CT. There was no significant decrease in the grain yield of maize even when irrigation was reduced. The path analysis revealed that the improvement of grain yield of maize with no\|tillage and plastic film mulching was mainly attributable to the increase in spike number per planting area and hundred\|kernel weight. Therefore, at water\|limited arid area, integrating no\|tillage with plastic film mulching can be used as a suitable planting pattern for maize production. |
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