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果树树体未老先衰,枝少、叶薄,落花落果严重,习惯上叫‘小老树’。据其成因,可采取以下措施进行改造: 一、放树窝改土增肥。这种方法在春、夏、秋季均可进行。即在树冠下挖深九十厘米,宽八十厘米的环状沟,然后在沟内施入农家肥,再填入表层熟土,底层生土覆于地表。这种做法在于改善果树根系生长环境,以利根系生长。二、树下地面覆盖。干旱地区的果园,常因缺水而影响树体生长发育,形成‘小老树’。对于这种果树,进行树下覆盖效果很好。覆盖物可用杂草、秸秆等,覆盖物厚度为十厘米左右。有条件的可进行树盘覆盖塑料薄膜,效果更好。这样可提高土壤湿度和温度,促进根系生长。三、合理修剪,增加枝量。对各主、侧枝头要
Fruit tree is not old before the first failure, fewer branches, thin leaves, falling flowers serious, habit called ’little tree’. According to its causes, can take the following measures to carry out transformation: First, putting tree nest soil to increase fertilizer. This method can be carried out in spring, summer and autumn. Under the canopy dig deep ninety centimeters, eighty centimeters wide annular groove, and then into the ditch into the manure, and then fill the surface of mature soil, the underlying raw soil over the surface. This approach lies in improving the root growth environment of fruit trees to facilitate root growth. Second, under the tree ground cover. Arid areas of the orchards, often due to lack of water and affect the growth and development of trees, the formation of ’little old tree’. For this kind of fruit tree, the effect of covering under the tree is very good. Cover available weeds, straw, covering thickness of about 10 cm. Conditional for tree cover plastic film, the effect is better. This increases soil moisture and temperature and promotes root growth. Third, a reasonable pruning, increase the amount of branches. On the main, side branches want