摘要
采用"土壤养分状况系统研究法"对我省龙眼主要产区的24片龙眼国进行实地调查、采集土样并进行分析.结果表明，24片被调查果园上由中氮、磷、钾、钙、镁、硫、硼、铜、锌和锰的速效态含量低于临界值的分别有23、20、18、16、23、8、15、20、21和11个土样;铁的含量均高于临界值.中微量元素如镁、钙和锌等的缺乏范围和程度已接近氮磷钾三要素.因此制定龙眼施肥措施应考虑大、中、微量元素的综合平衡.
A systematic approach for soil nutrient status has been used to evaluate soil nutrient status in site soils of longan in Guangdong province. The results show that there are 23, 20, 18, 16, 23, 8, 15, 20, 21, and 11 soil respectively indicating deficiency in N, P, K, Ca, Mg. S, B, Cu, Zn, and Mn among 24 soils sampled from different orchards of the province. The content of available iron (Fe) is higher than the critical value for all soils. The deficiency in some medium- and micro-nutrients such as Ca, Mg and Zn, has almost been comparable to the deficiency in N, P and K. Therefore, the development of balanced fertilization should be laid emphasis on longan production.
基金
广东省科委"九五"攻关项目!962204101
