黑龙江推广大麦-荞麦二熟制的生态适宜度分析

在全球气候变化背景下,我国黑龙江地区热量资源显著增加。从生态适宜度的角度分析了黑龙江地区改一熟制为大麦-荞麦二熟制的可行性。首先基于作物生育期特点及前人研究成果,利用温度、降水、日照和生态适宜度模型计算适宜度值,并通过生态适宜度与相对气象产量的相关分析确定作物减产临界值,以减产率为0、15%和30%作为作物适宜度划分阈值,进一步利用ArcGIS进行栅格叠加产生大麦-荞麦二熟制生态适宜度分布图,发现黑龙江部分地区已具备发展二熟制的生态条件。大麦-荞麦二熟制与传统种植模式对比,显示出明显的经济效益,即使灌溉一次仍有一定优势;最后从经济效益和劳动力需求两方面分析大麦-荞麦社会效益,表明大麦-荞麦模式具有较高推广度。

The ecological suitability of barley-buckwheat double cropping system in Heilongjiang Province

The thermal resources significantly increased in Heilongjiang plantation area due to the global climate change; therefore the feasibility of a barley-buckwheat double cropping system instead of a single cropping system in Heilongjiang was analyzed from the aspect of ecological suitability. According to the past studies, the suitability value was calculated using temperature, precipitation, sunshine and ecological suitability model. The correlation analysis between the ecological suitability and the relative meteorological yield was conducted to determine the critical value of crop production. the grid producing barley-buckwheat double cropping ecological suitability maps were made based on the reduction rates of 0, 15% and 30%, indicating that some regions in Heilongjiang Province have the ecological conditions for planting the double crops. Compared with the traditional planting pattern, there were obvious economic advantages in the double cropping system under one irrigation scenario. According to the analysis of social need and labor need, the barley-buckwheat model would be of high popularization in Heilongjiang Province.