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材料与方法1980—1984年进行本研究,以期找出荔枝最的佳 N、P、K 肥施用量。试验地为粘砂土,PH 值为8.7,导电性为0.25毫欧姆/厘米,有机碳为0.3%,有效 P_2O_5为15公斤/公顷,有效 K_2O 为150公斤/公顷,可看出土壤含有机碳低,含 P 和 K 中等,PH 值和导电性属正常水平,试验品种为 Calcuttia Late;于1975年9月、树龄1年时种植,每年每株施肥量为:氮肥施用量(50、100、150克)与 P_2O_5和 K_2O 的两个施用量(25、50克),因此有12个不同配比,重复3次,每处理2株,试
MATERIALS AND METHODS The study was conducted from 1980 to 1984 with a view to finding the best N, P and K fertilizers for litchi. Tested sand as sticky sand, with a pH of 8.7, conductivity of 0.25 milliohms / cm, organic carbon of 0.3%, effective P 2 O 5 of 15 kg / ha, and available K 2 O of 150 kg / ha, soil organic carbon Low, containing P and K medium, PH value and conductivity are normal levels, the test species Calcuttia Late; in September 1975, 1 year old plantation, the amount of fertilizer per plant per year: nitrogen fertilizer application (50,100, 150 g) and P_2O_5 and K_2O (25, 50 g), so there are 12 different stoichiometry, repeated 3 times, each processing 2, test