桂西北新建柑橘园土壤水分变化及其水分管理

Change of Moisture and Management on Water in Soil from Newly Established Citrus Orchards in the Northwest of Guangxi Zhuang Autonomous Region

对桂西北不同类型柑橘果园的土壤水分含量及柑橘枝梢生长情况、果实品质等进行了观测和分析。结果表明 ,果园土壤含水量与土壤层次、建园时开梯与不开梯以及果园成土母质有关 ,果园土壤含水量年变化规律与全年每月降水量有关。在桂西北 ,每年4—8月为多雨季节 ,果园土壤含水量能满足果树生长所需。9—10月 ,正值秋梢及果实生长旺期 ,降水减少 ,土壤含水量降低 ,影响果树的生长发育 ,要及时灌水。10月以后 ,果实采收前 ,可适当控水 ,以促进秋梢花芽分化和果实风味。采果后 ,仍有冬旱 。

The present investigation dealt with contents of moisture, growth of yang tips and citrus quality from newly established citrus orchards in the Northwest of Guangxi Zhuang Autonomous Region. It has been found that the moisture contents in soil were related with soil profile, open or close during setting up the orchards and the parent rock deriving the soil. Generally, the contents of moisture in the soil were closely related with monthly precipitation. In the studied region, the moisture can meet necessity of the plant during the rainy season from April to August; while from September to October, irrigation is timely needed as less precipitation, resulting in reduction of moisture in soil. After October and before harvest, irrigation sometimes is also needed to maintain appropriate growth of the citrus plant.