摘要
The analysis on the trend change of heat resources serviced for the industrial structure adjustment of agriculture and the increase of agricultural economical income.The result showed that increase trend of heat resources in Fuxin region was obvious.≥0 ℃ first day trend advanced 12 d,and the interval days trend increased 17 d.Moreover,the accumulated temperature trend increased 396 ℃.≥10 ℃ first day trend advanced 7 d,and the final day trend delayed 9 d.Moreover,the interval days increased 15 d,and the accumulated temperature trend increased 350 ℃.The latest frost date trend advanced 10 d,and the first frost date trend delayed 12 d.Moreover,the frost-free period trend prolonged 23 d.On one hand,the increase of heat resources favored the adjustment of crops variety structure,the development of agricultural facilities,the change of agricultural measures,the improvement of multiple cropping indexes and the increase of agricultural economical income.On the other hand,it made that the agricultural pests shifted northward by passing the winter boundary,and the insect source radix increased.In addition,the heat resources increase would also cause that the soil potential evapotranspiration increased,and the precipitation utilization ratio decreased.Then,the agricultural production environment worsened,and the dry land agriculture,irrigated agriculture were threatened.It could be said that the advantages and disadvantages of climate warming and heat resources increase on the agricultural production both existed.
The analysis on the trend change of heat resources serviced for the industrial structure adjustment of agriculture and the increase of agricultural economical income.The result showed that increase trend of heat resources in Fuxin region was obvious.≥0 ℃ first day trend advanced 12 d,and the interval days trend increased 17 d.Moreover,the accumulated temperature trend increased 396 ℃.≥10 ℃ first day trend advanced 7 d,and the final day trend delayed 9 d.Moreover,the interval days increased 15 d,and the accumulated temperature trend increased 350 ℃.The latest frost date trend advanced 10 d,and the first frost date trend delayed 12 d.Moreover,the frost-free period trend prolonged 23 d.On one hand,the increase of heat resources favored the adjustment of crops variety structure,the development of agricultural facilities,the change of agricultural measures,the improvement of multiple cropping indexes and the increase of agricultural economical income.On the other hand,it made that the agricultural pests shifted northward by passing the winter boundary,and the insect source radix increased.In addition,the heat resources increase would also cause that the soil potential evapotranspiration increased,and the precipitation utilization ratio decreased.Then,the agricultural production environment worsened,and the dry land agriculture,irrigated agriculture were threatened.It could be said that the advantages and disadvantages of climate warming and heat resources increase on the agricultural production both existed.
