| Dry matter production and resources use efficiency of double cropping winter wheat forage maize system in North Xinjiang |
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| DOI：10.7606/j.issn.1000-7601.2013.06.005 |
| Key Words: winter wheat forage maize system double cropping dry matter and energy production efficiency resource use efficiency Northern Xinjiang |
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| Abstract: |
| In order to meet the market requirement for forage maize and develop new cropping system with high dry matter production and resources use efficiency, the field experiments were conducted in the temperature limited regions of North Xinjiang in 2011 and 2012. The ecologic conditionss includ
ing radiation and temperature were recorded and dry matter production was determined. In addition, dry matter production and resources use efficiency were compared between winter wheat forage maize system and conventional winter wheat systems. The results showed that annual production efficiency of dry matter, energy production, radiation production efficiency, and temperature production efficien
cy in double cropping wheat maize system were 84.8%, 87.8%, 87.0% and 103% compared with onventional winter wheat system, respectively. Annual production efficiency of dry matter of sequential cropping forage maize was 7.1% lower than spring forage maize, and the light use efficiency and temperature efficiency were 0.12 g·MJ-1 and 0.7 kg·hm-2·℃-1 higher than spring forage maize, respectively. Therefore, the double cropping system can increase natural resources use efficiency and have favourable effect on the utilization of light and temperature during the growing season. The proposed system offers a new approach both for increasing crop diversity and crop production in northern Xingjiang. |
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