Analysis of Major Factors Influencing Crop Yield of Shandong Province

摘要

Based on the evaluation on overall grain production capacity, the major factors influencing grain production in every decade were analyzed using the grain yield statistics in over 60 years of Shandong Province. The factors included crop varieties andrelated production techniques, applying amount of chemical fertilizers, total investment of agricultural machinery, natural hazards, agriculture policies and market. Their relations with grain production were also analyzed. The results showed that the first factor leading to the increase of interannual volatility of grain yield was the applying amount of chemical fertilizers; the second one was effective irrigation area, and the third one was grain cultivation area. Drought hazard was the main factor decreasing grain yield. Per unit yield was the first factor influencing total grain yield of Shandong Province. The hazard rate of farmlands had obvious effects on total grain yield, and they showed apparently negative correlativity.