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为了因地制宜地推广柑桔良种,在中国农科院柑桔研究所的大力支持下,于68年3月引进一批柑桔良种区化苗,在我区高山公社南关大队下街生产队定植,现将几年来区化苗的表现简报如下。下街队位于赤水河西畔半山腰,海拔700～800米,区化苗果园位于下街队的西南面,果园东部是平地,西部为缓坡地。海拔750米左右,年均温16℃,元月均温5℃,七月均温27℃,绝对最高气温39℃,绝对最低气温0℃。土质为录土,偏酸性,年降雨量500～900毫米。果园内大季套包谷或红苕,小季套小麦或胡豆。72年以前管理十分粗放,73年以来稍为改进一些,每年施肥一次,一般在冬季或早春。果园病害主要是白粉病,其它病害很少,但虫害较多,有蚧壳虫、潜叶蛾、卷叶蛾、螨类等,且为害很严重,每年需喷药2～3次。幼树整形粗放,一般都是自然形,68年因交通不正常,苗木在途中停
In order to promote the appropriate citrus varieties according to the local conditions, with the strong support of the Chinese Academy of Agricultural Sciences Institute of Citrus, in March 68 to introduce a group of citrus varieties of seedlings, alpine commune in our district South Gate Brigade downstreet production team colonization Now the performance of area-based seedlings in recent years are as follows. Down Street team is located in the Chishui River West Bank halfway up the mountain, 700-800 meters above sea level, the area of seedlings Orchard is located in the southwest of the street team, the orchard east is flat, the western gentle slope. About 750 meters above sea level, the average annual temperature of 16 ℃, January average temperature of 5 ℃, July average temperature of 27 ℃, the absolute maximum temperature of 39 ℃, the absolute minimum temperature of 0 ℃. Soil is recorded soil, acidic, annual rainfall 500 ~ 900 mm. Large season set in the orchard valley or redheads, small sets of wheat or walnuts. 72 years ago, the management was very extensive. It has been slightly improved since 1973, fertilizing once a year, usually in winter or early spring. Orchard disease is mainly powdery mildew, few other diseases, but more pests, scale insects, leaf moths, leaf roller mites, mites, and the damage is very serious, need to spray 2 to 3 times a year. Saplings thick plastic surgery, are generally natural, 68 due to traffic is not normal, nursery stock on the way stop