| Water and fertilizer utilization efficiency of multicropping wheat and broccoli under drip irrigation and film mulching |
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| DOI：10.7606/j.issn.1000-7601.2020.04.15 |
| Key Words: drip irrigation under film wheat multicropping broccoli yield water and fertilizer utilization efficiency |
| Author Name | Affiliation | | TIAN Delong | Institute of Water Resources for Pastoral Area, Ministry of Water Resources Hohhot, Inner Mongolia 010020, China | | HOU Chenli | Institute of Water Resources for Pastoral Area, Ministry of Water Resources Hohhot, Inner Mongolia 010020, China
College of Water Conservation and Civil Engineering, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | MA Xin | Inner Mongolia Water Conservancy Research Institute, Hohhot, Inner Mongolia 010018, China | | Chen Hongfu | Inner Mongolia Baotou Flood Control and Drought Control Center (Information), Baotou, Inner Mongolia 014030, China |
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| Abstract: |
| From April 2017 to September 2018, field experiments were conducted to study the effects of different irrigation rates of drip irrigation under film on the growth status, water and fertilizer utilization efficiency and benefits of multicropping wheat and broccoli, and traditional border irrigation was used as a control. The results showed that drip irrigation under film\|mulching was beneficial in increasing crop yield and water use efficiency, and compared with traditional border irrigation, the average wheat yield and WUE increase by 12.62% and 39.10%, but with the increase of irrigation amount, the effect of crop yield increase decreased and the growth rate of water consumption decreased. Under mulch\|drip irrigation, the maximum yield (5 468.57 kg·hm-2) of wheat obtained by high water treatment was not significantly different from that obtained by medium water treatment (P＞0.05). Compared with traditional border irrigation, the yield increased by 15.65%, water use efficiency and nitrogen partial factor productivity increased by 40.03% and 15.65%, respectively. Mulching drip irrigation was beneficial to supplement soil nitrogen pool, increase soil fertility, and the average consumption of N fertilizer in soil decreased by 25.52% compared with traditional border irrigation. When the drip irrigation quota was 4 620 m3·hm-2, the average net output value of wheat\|broccoli was 8 513.77 yuan·hm-2, higher than that of traditional border irrigation, and the average output value was 15.30% higher than that of traditional border irrigation. |
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