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首页> 外文期刊>International Journal of Agriculture and Biology >Higher Yields of Rain-Fed Maize Affected by Drought and Sowing Date in a Semi-Humid Region of North-Eastern China
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Higher Yields of Rain-Fed Maize Affected by Drought and Sowing Date in a Semi-Humid Region of North-Eastern China

机译：东北半湿润地区受干旱和播种期影响的雨养玉米高产

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This field experiment was sown at different dates with 10-day intervals beginning 20 April for two years (2014–2015). Total growth period was significantly (P < 0.001) and negatively correlated to the average temperature during the entire growing season and decreased progressively with the extent of delay in sowing. Average above ground dry matter at maturity (235–311 g/plant) for all the five sowing dates in 2015 was lower than in 2014 (312–447 g/plant) due to low soil moisture, especially during the reproductive stage in July and the grain filling stage in August. In 2014, grain yield decreased progressively with the delay in sowing, whereas in 2015, the pattern was reversed. Grain yield was significantly (P < 0.001) and positively correlated to the number of kernels per ear. The date of sowing is crucial in drought years and can lower the yield losses of rain-fed maize by 11–39% in the semi-humid region of North Eastern China, and choosing the right date based on climatic prediction may help in reducing the impact of drought on yield.
机译：此田间实验在4月20日开始的不同日期播种，间隔10天，为期两年（2014-2015年）。总生长期显着（P <0.001），并且与整个生长期的平均温度呈负相关，并且随着播种延迟的程度逐渐降低。由于土壤水分低，尤其是在七月和九月的生殖期，2015年所有五个播种期的成熟期地上干物质平均水平（235-311克/植物）低于2014年（312-447克/植物）。八月份的谷物灌装阶段。 2014年，谷物播种量随播种延迟而逐渐下降，而2015年，这种情况发生了逆转。谷物产量显着（P <0.001），与每只耳朵的粒数成正相关。播种日期在干旱年份至关重要，可以使中国东北半湿润地区雨养玉米的单产损失降低11–39％，并且根据气候预测选择合适的日期可能有助于减少播种期。干旱对产量的影响。

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