| Analysis on the water-saving characteristics of winter wheat and summer maize cropping system on Haihe Plain |
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| DOI：10.7606/j.issn.1000-7601.2019.05.02 |
| Key Words: wheat-maize cropping system yield water use efficiency Haihe Plain |
| Author Name | Affiliation | | ZHENG Yuan-yuan | Hebei Agricultural University, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei 071000, China | | CHEN Zong-pei | Hebei Agricultural University, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei 071000, China | | WANG Gui-yan | Hebei Agricultural University, Key Laboratory of Crop Growth Regulation of Hebei Province, Baoding, Hebei 071000, China |
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| Abstract: |
| Water shortage is one of the most important challenges for grain production in Haihe Plain. To design more suitable cropping system and overcome the challenge of water scarcity in the region, the grain yield and water use efficiency（WUE）of different cropping systems mainly involving wheat (Triticum aestivum L.) and maize (Zea mays L.) were investigated, providing a scientific basis for food security and proper agriculture production. The field experiments were conducted from 2014 to 2016 in Jingxian County, Hebei Province. The treatments were set as five cropping systems including winter wheat-summer maize double cropping system (CK), spring maize-winter wheat-summer maize three harvests in two years (A1), spring maize-summer maize double cropping system (A2), spring maize single cropping system (A3), and summer maize single cropping system (A4). The results showed that the total grain yield of CK was the highest at 38 574.24 kg·hm-2 during the two growing seasons (2014—2016); the grain yields of A1, A2, A3 and A4 were 23.7%, 23.8%, 51.2% and 39.6% lower than that of CK, respectively. The CK had the highest total water consumption (1851.45 mm), and the total water consumtion of A1, A2, A3 and A4 were significantly decreased 504.3,452.3,753.5 mm and 712.8 mm, respectively， compared with CK. A1 reached the highest WUE (21.84 kg·mm-1·hm-2) but there was no significant difference between treatments. The results also showed that, compared to the CK, A1 and A2 decreased total yield and used less total water consumption, 504.25 mm and 452.30 mm less than CK, respectively, but increased WUE, 4.8% and 0.8% over CK, respectively. Our results demonstrated that these two cropping systems, A1 and A2, could be important complements to current wheat-maize cropping systems and essential for promoting food production and sustainable water development in this region. |
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