山东省属半干旱地区。年降雨量少 ,人均占有水资源 410 m3,不足全国人均占有量的1/6。黄河自 1972年以来 ,已有 2 0多年出现断流 ,其中 1981年和 1995年省境内全河断流 ,1997年断流达 2 33天。同时 ,大多数的水库、塘坝、内河干涸 ,严重阻碍了水稻生产。因此 ,对山东省旱稻种质 Shandong Province is a semi-arid area. The annual rainfall is small, with per capita water resources 410 m3, less than 1/6 of the national average. Since 1972, the Yellow River has witnessed a drying up over 20 years, of which the whole province was cut off in 1981 and 1995, and the flow was cut off for 233 days in 1997. At the same time, most of the reservoirs, ponds and rivers have dried up, seriously hampering rice production. Therefore, Shandong Province, upland rice germplasm