Abstract:

The paper aims to study the impact of wetland climate on grain production and achieve the purpose of increasing production. Taking the Qixinghe Wetland National Nature Reserve as an example, and annual mean temperature, precipitation of wetland from 1961 to 2008, and total yield and yield per unit of its surrounding three villages and one farm as the data, we adopted trend analysis, grain production decomposition, and correlation coefficient calculation to analyze the change trend of grain production and the impact of wetland climate on grain production of its surrounding villages and farm. The results showed that the Wujiuqi farm was ranked the first in terms of total yield, yield per unit and increasing rate. Qingyuan was ranked the second, Jianshanzi was the third and Qixinghe was the last. It illustrated that the distance from the wetland had a certain impact on the grain production, the grain production of those four areas, especially the variance of grain production of Wujiuqi farm, had a rapid response to the change of wetland precipitation, grain production increased in the dry year with less precipitation, on the contrast, decreased in the wet year with more precipitation. Simultaneously, the temperature change also had a greater impact on the grain production of the current year, but less impact on the trend of grain production Y_w increase or decrease, while the change of the precipitation had the domain impact on the Y_w production changes. Therefore, it concluded that the wet and cold climate of the wetland was unfavorable to its surrounding grain production. The results of the experiment were consistent with the above conclusions, especially through the actual monitoring of climate and grain production in the recent 10 years. Taken together, measures need to be taken to control the flood, strengthen the farmland infrastructure construction, and develop ecological agriculture to ensure grain production under both drought and flood.

Key words: Qixinghe wetland national nature reserve, wetland wet and cold climate, surrounding areas, impact on grain production, water log control measurements