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1 材料与方法以重庆市北碚区歇马镇人和村、水口村、小湾村新植枳砧北碚447锦橙幼树为试材,人和村于 1998年4月定植,水口村和小湾村于该年 9 月定植。土壤为紫色石谷子土,均为新改造梯地,土壤中性至微碱性,土壤肥力极低,试验前土壤有机质低于5 g/kg。试验设4 个配方施肥处理,?
MATERIAL AND METHODS One hundred and forty-four New Zealand orange trees were planted in Renhe Village, Shuikou Village and Xiaowan Village, Rest Town, Beibei District, Chongqing City. Renhe Village was planted in April 1998 and Shuikou Village was small Bay Village colonized in September of that year. The soil is purple rocky millet soil, all of which are new modified ladders. The soil is neutral to slightly alkaline with very low soil fertility. Soil organic matter is below 5 g / kg before the test. Experiment set four formula fertilization treatment,?