G. Dumbuya, H. Alemayehu, M. Hasan, Maya Matsunami, H. Shimono
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引用次数: 6
摘要
在寒冷气候下,低温对甘薯的生长和产量至关重要。. 尽管它有负面影响,但很少有研究对其影响进行量化。通过在日本北部进行的2年田间试验,评价了土壤温度对甘薯生长和产量的影响。在21~24℃范围内,采用不同颜色(绿、黑、白)的地膜分三步控制温度,特别是在覆盖冠层之前的生长早期。高温度显著提高了葡萄的伸长、分枝和叶片外观,且随着生长阶段的推进,高温度增加的幅度逐渐减小。增加T显著提高叶片叶绿素含量和气孔导度。在不同处理和年份,地上生物量与T s呈线性正相关,T s每增加1°C,地上生物量增加58 g m -2。但高温度对最终贮藏根鲜产量的影响不显著。在高温度下,单株储存根重的增加被储存根数的减少所抵消。目前在日本北部进行的定量研究表明,在寒冷气候条件下,高温度条件下甘薯地上部生长的增强,特别是生长早期的增强,对贮藏根产量的增加没有贡献。
Effect of soil temperature on growth and yield of sweet potato (Ipomoea batatas L.) under cool climate
In cool climates, low temperature is critical for growth and yield of sweet potato ( Ipomoea batatas L. ) . Despite its negative effects, few studies have quantified the impact. We evaluated effects of soil temperature ( T s ) on growth and yield in sweet potato from 2-year field trials in northern Japan. T s was controlled by three steps using plastic mulch at different colors ( green, black and white ) with different T s ranged in 21~24 ° C especially at early growth before the surface of the mulch covered by plant canopy. Higher T s significantly increased vine elongation, branching, and leaf appearance, and the magnitude of increased by higher T s decreased with proceeding growth stages. Increasing T s significantly increased leaf chlorophyll content and stomatal conductance. Across treatments and years, aboveground biomass was linearly and positively correlated with T s , and 58 g m -2 increased in aboveground biomass was observed per 1 ° C increase in T s . However, final storage root fresh yield was not significantly affected by high T s over years. Increased individual storage root weight at high T s was offset by decreased storage root number. The present quantitative study tested in northern Japan showed that, the enhanced aboveground growth in sweet potato at higher T s especially during early growth did not contribute to increase of storage root yields in cool climates.
期刊介绍:
For over 70 years, the Journal of Agricultural Meteorology has published original papers and review articles on the science of physical and biological processes in natural and managed ecosystems. Published topics include, but are not limited to, weather disasters, local climate, micrometeorology, climate change, soil environment, plant phenology, plant response to environmental change, crop growth and yield prediction, instrumentation, and environmental control across a wide range of managed ecosystems, from open fields to greenhouses and plant factories.