南方稻区水稻产量差的变化及其气候影响因素
石全红;刘建刚;王兆华;陶婷婷;陈阜;褚庆全
【期刊名称】《作物学报》
【年(卷),期】2012(038)005
【摘要】In order to study theoretical potential productivity, yield promotion space, yield constraints and the solution approaches, we used AEZ (Agricultural Ecology Zone) model to estimate the photothermal potential productivity of rice and calculate the rice yield gaps from 1980 to 2010 in southern China. The results showed that early rice potential productivity continued to increase with grater increasing rate than ihe actual yield, so the early rice yield gap became bigger. The potential productivity of medium rice and late rice was declined; and the rice yield gap became smaller. The analysis of climatic factors showed that temperature and radiation in rice growth period were the most important impact factors for rice potential yield and yield gaps. The positive effect of temperature increasing for the early rice was bigger than the negative effect of radiation declining, resulting in the increase of the potential productivity. On the contrary, the negative effect of radiation declining for medium rice and iate rice was bigger, so the potential productivity was dropping. The temperature and radiation in rice growth period were different, causing different changing trends of rice potential yield and yield gap between provinces.%为了研究南方稻