论文部分内容阅读
汉中地区北靠秦岭,南临巴山,汉江自西向东纵贯其中,形成狭长的汉中盆地。当地年雨量在800——1200毫米左右,山区雨量稍多,盆地1月平均温度为2.1℃,山区1月份常年平均温度为1.4——1.9℃。盆地海拔高度500米左右。小麦种植的最高海拔约1800米。在盆地和海拔千米以下的浅山区为稻麦二熟区,千米以上的山区为两年三熟区,种植作物以小麦、玉米为主。自1972年以来,小麦条锈病曾于1973、75、77、79、80年出现全区性流行。1977年发病面积较大,达20余万亩。1980年是发病最重的一年,发病面积约80余万亩,占麦田总面积53.3％,其中重病田面积近40万亩,占发病田面积50％。以往发病轻的洋县(盆地
Hanzhong area north of Qinling, south of Bashan, Han River from west to east longitudinal, which formed a narrow Hanzhong basin. The annual rainfall in the 800 - 1200 mm, slightly more rainfall in the mountains, the basin in January the average temperature of 2.1 ℃, the annual average January mountain temperatures of 1.4 - 1.9 ℃. Basin elevation of about 500 meters. The highest altitude of about 1800 meters of wheat cultivation. In the basin and elevation of less than 1000 meters below the mountainous area for rice and wheat two paddy, kilometers of mountainous areas for two years three areas, planting crops to wheat, corn-based. Since 1972, wheat stripe rust was endemic in 1973, 75, 77, 79 and 80 in the whole country. In 1977 a larger area, reaching more than 20 acres. 1980 is the most serious year of onset, the incidence of about 80 acres, accounting for 53.3% of the total area of the wheat field, of which nearly 400000 acres of seriously ill, accounting for 50% of the area of the disease. In the past the incidence of light Yangxian (basin