| Effects of planting patterns on photosynthetic pharacteristics and grain yield of maize in dryland |
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| DOI：10.7606/j.issn.1000-7601.2017.05.02 |
| Key Words: maize-potato intercroped photosynthetic characteristics crop yield LER |
| Author Name | Affiliation | | REN Jin-hu | Gansu Provincial Key Laboratory of Arid Land Crop Science, Agronomy College of Gansu Agriculture University, Lanzhou, Gansu 730070, China | | XIE Jun-hong | Gansu Provincial Key Laboratory of Arid Land Crop Science, Agronomy College of Gansu Agriculture University, Lanzhou, Gansu 730070, China | | LI Ling-ling | Gansu Provincial Key Laboratory of Arid Land Crop Science, Agronomy College of Gansu Agriculture University, Lanzhou, Gansu 730070, China | | Lamptey Shirley | Gansu Provincial Key Laboratory of Arid Land Crop Science, Agronomy College of Gansu Agriculture University, Lanzhou, Gansu 730070, China | | Stephen Yeboah | Gansu Provincial Key Laboratory of Arid Land Crop Science, Agronomy College of Gansu Agriculture University, Lanzhou, Gansu 730070, China | | ZHANG Ming-jun | Gansu Provincial Key Laboratory of Arid Land Crop Science, Agronomy College of Gansu Agriculture University, Lanzhou, Gansu 730070, China | | GAO Hai-qiang | Gansu Provincial Key Laboratory of Arid Land Crop Science, Agronomy College of Gansu Agriculture University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to further optimize the high-yielding cultivation techniques of maize in semi-arid region of Central Gansu Province and improve the efficiency of limited water and soil resources, the field experiment was conducted for studying the effects of photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), intercellular CO2 concentration (Ci) and grain yield of maize in maize-potato intercropping and monoculture under double ridges and furrow with plastic-film mulching, flat planting with plastic-film mulching and flat planting without mulching from 2014 to 2015. The results showed that: (1) The diurnal variation of Pn and Tr in the maize tasseling stage under different planting patterns showed a single peak and then descended, and the peak appeared at about 12∶00 pm. The Pn and Tr of double ridges and furrow with plastic-film mulching was higher than that of the flat planting with plastic-film mulching and flat planting without mulching, also the Pn and Tr of intercropping was higher than that of monoculture. And Pn, Tr and Gs of maize were the highest under double ridges and furrow with plastic-film mulching in the maize-potato intercropped. (2)The LER of maize-potato intercropped was more than 1, and the grain yield of maize was 5 451.35 kg·hm-2 under double ridges and furrow with plastic-film mulching in the maize-potato intercropped, compared with intercropping under flat planting without mulching increased by 66.00%, especially in the years of low rainfall, the yield effect is more obvious. Therefore, the maize-potato intercroped planting patterns are feasible to further improve the yield of maize and the efficiency of water and soil in the rain-fed agricultural region of Central Gansu Province, and the maize-potato intercropped under double ridges and furrow with plastic-film mulching is a better planting pattern. |
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