| Response of maize agronomic traits, yield, water and fertilizer use efficiency to intercropping green manure under reduced irrigation levels in arid irrigation areas |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2024.05.09 |
| Key Words: maize green manure intercropping reduced irrigation agronomic traits yield water and fertilizer use efficiency |
| Author Name | Affiliation | | ZHANG Diaoliang | State Key Laboratory of Arid Land Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHAI Qiang | State Key Laboratory of Arid Land Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | YIN Wen | State Key Laboratory of Arid Land Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | HU Falong | State Key Laboratory of Arid Land Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FAN Zhilong | State Key Laboratory of Arid Land Crop Science, College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
|
| Hits: 158 |
| Download times: 122 |
| Abstract: |
| A split\|zone experiment was conducted from 2020 to 2022 with a main plot comparing maize intercropped with common vetch (M‖V) and sole maize (SM), and a split\|plot design testing three irrigation levels: high (I3, 400 mm), medium (I2, 340 mm), and low (I1, 280 mm). The objective was to investigate the effects of intercropping green manure on agronomic traits, yield, soil total nitrogen content, water use efficiency (WUE), and nitrogen partial factor productivity (PFPF) of maize under reduced irrigation conditions. The results indicated that the M‖V treatment significantly enhanced maize plant height, stem diameter, and ear height, with increases ranging from 6.3%~14.3%, 5.4%~12.0%, and 12.5%~22.1%, respectively, compared to SM treatment. Furthermore, intercropping led to enhancements in maize ear length, ear diameter, row number per ear, and kernel number per row, with increases of 5.7%~20.2%, 3.7%~13.6%, 2.7%~5.9% and 6.8%~17.7%, respectively. Within the intercropping patterns, no significant differences were found between M‖VI2 and M‖VI3 concerning maize plant height, stem diameter, ear height, ear length, ear diameter, row number per ear and kernel number per row. Each of these indices exhibited significant increases of 6.7%~7.7%, 4.9%~5.8%, 7.7%~11.6%, 6.2%~11.3%, 2.0%~5.1%, 1.0%~2.0% and 5.2%~10.3%, respectively, compared to the M‖VI1 treatment. The M‖V treatment demonstrated significant yield improvements over the SM treatment, with grain yield and biomass increase ranging from 7.7%~27.9% and 5.7%~19.2%, respectively. No significant differences were observed in grain yield and biomass yield between the M‖VI2 and M‖VI3 treatments, and the two indicators were significantly enhanced by 5.7%~15.5% and 4.7%~8.0% compared to M‖VI1 treatment, respectively. Additionally, the M‖V treatment significantly improved total nitrogen content in the 0~40 cm soil layer, WUE and PFPF by 5.8%~7.9%, 12.4%~28.3% and 7.7%~27.9%, respectively, compared to the SM treatment. In the intercropping pattern, no significant differences in PFPF were noted between the M‖VI2 and M‖VI3 treatments, and the lower irrigation treatment resulted in a significant increase in PFPF by 5.7%~15.5%. In contrast, the M‖VI2 treatment exhibited a significant increase WUE of 7.7%~10.8% when compared to the M‖VI3 treatment. The study demonstrated that intercropping with common vetch significantly enhances soil total nitrogen content, which in turn improves various maize plant characteristics, including plant height, stem diameter, ear height, ear length, ear diameter, and row number per ear. These improvements ultimately led to an increase in both the grain number per ear and the 1000\|grain weight, ensuring that maize yield was maintained under medium irrigation (340 mm), thereby increasing the efficiency of water and fertilizer use. Consequently, intercropping common vetch with 340 mm of irrigation is recommended as a high\|efficiency strategy for maize intercropping with green manure within the safe range of water resources in Hexi irrigation district. |
|
|
|