关键词: 早籼稻, 大豆, 中晚稻, 轮作, 粮食安全

Abstract:

Since the reform and opening-up, the early indica rice production first increased and then suppressed. In recent years, the early indica rice production has been continuously wandering below 30 million tons, and the market supply and demand are gradually tightening while the price trend is strong. It is necessary to increase the yield of early indica rice moderately under the current situation because of its great significance to the food security of China. The different rotation modes such as the “early indica rice plus autumn soybean” in the main producing areas of early indica rice is a good way to stabilize grain efficiency and improve soil conditions by comprehensive analysis of the advantages and disadvantages of them. These model can generate a modest increase in the yield of early indica rice, improve soybean supply and appropriately reduce the purchase price of mid-late indica rice, mealwhile improve soil and raise rice yield per unit area, and make the structure of the three major rice types and grain types more reasonable.

Key words: early indica rice, soybean, middle-late rice, crop rotation, food security