首页> 外文期刊>Journal of Agronomy and Crop Science/Zeitschrift fur acker-und pflanzenbau >Performance of agricultural systems under contrasting growing season conditions in South-western Quebec.
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Performance of agricultural systems under contrasting growing season conditions in South-western Quebec.

机译:魁北克西南部生长季节条件下农业系统的表现。

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Climate change will alter temperature and rainfall patterns over North American agricultural regions and there will be a need to adapt crop production systems to the altered conditions. A set of field experiments were conducted in south-western Quebec, Canada, with soybean (Glycine max L.), corn (Zea mays L.), sorghum (Sorghum bicolor L.) x sudangrass (Sorghum sudanense Piper) hybrid and switchgrass (Panicum virgatum L.) under two tillage and three nitrogen fertility regimes, to study their performance in three successive growing seasons (2001-2003), two of them with unusually warm and dry conditions. The annual crops were established in two tillage systems: conventional and no-till (NT). All crops except soybean were fertilized with three levels of nitrogen: corn - 0, 90 and 180 kg N ha-1, sorghum-sudangrass - 0, 75 and 150 kg N ha-1, switchgrass - 0, 30 and 60 kg N ha-1. The 2001 and 2002 seasons were hotter and drier than the 2003 season, which was the most favourable for crop growth. The capacity of the crops to yield in dry seasons was as follow: switchgrass > sorghum-sudangrass > corn > soybean. The corn and sorghum-sudangrass responses to nitrogen fertilizer were low in 2001 due to the combined effect of dry growing season and coarse soil texture. Soybean did not perform well under NT. Corn yielded better at the highest nitrogen fertilizer rate under NT when the early season was warmer than the normal. Our results show that switchgrass and sorghum-sudangrass could be an option in south-western Quebec if the frequency of hot and dry seasons increase in the future, because of climate change.
机译:气候变化将改变北美农业地区的温度和降雨模式,需要将作物生产系统调整到改变的条件。在加拿大南部魁北克西南部进行了一组现场实验,用大豆(甘氨酸Max L.),玉米( Zea mays L.),高粱(高粱双子升 L.)X Sudangrass(高粱Sudanense 吹笛者)杂种和切换( Panicum Virgatum L.)在两次耕作和三个氮肥能力方面研究他们在三个连续的生长季节(2001-2003)中的表现,其中两个具有异常温暖和干燥的条件。在两种耕作系统中建立了年度作物:常规和常规(NT)。除大豆以外的所有作物用三个水平的氮气施肥:玉米 - 0,90和180 kg n Ha -1 ,高粱 - 苏丹草 - 0,75和150 kg n ha -1 < / sup>,switchgrass - 0,30和60 kg n ha -1 。 2001年和2002年赛季比2003年赛季更热,更干燥,这是对作物增长最有利的。干旱季节产量的产能如下:SwitchGrass>高粱 - 苏丹草>玉米>大豆。由于干生长季节和粗土质地的综合效应,2001年玉米和高粱 - 苏丹草对氮肥的反应较低。大豆在nt下没有表现良好。在初季温暖的时候,玉米在NT下的最高氮肥率下产生更好。我们的研究结果表明,由于气候变化,如果未来的炎热和干燥季节增加,魁北克州西南魁北克西南部和高粱 - 苏丹草可能是一个选择。

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