EksotikaⅡ品种番木瓜合理施肥量研究

2004年7月在海口市琼山区砖红壤地区的EksotikaⅡ品种番木瓜园,采用L18(37)正交设计,研究氮、磷、钾、镁、硼肥的不同配比和施肥量对植株生长量、果实产量、果实品质的影响。结果表明:(1)在开花初果期(植后90～240d),促进植株生长健壮(植株叶片数增量9.6～9.7条/月、结瓜数增量13.2～13.3个/月)的合理施肥量(每15d施肥1次)为N15g/株·次、P2O515g/株·次、K2O20g/株·次、Mg0.24g/株·次、B0.28g/株·次;(2)在开花结果收获期(定植240d以后),促进植株高产(年产量达45.33～47.58t/hm2)和保持果实糖度处于最佳水平(糖度值12.0%～12.6%)的合理施肥量(每15d施肥1次)为N35g/株·次、P2O515g/株·次、K2O45g/株·次、Mg0.44g/株·次、B0.40g/株·次。

Research on Reasonable Fertilization of Eksotika Ⅱ Papaya

An experimental garden of Eksotika II Papaya was built at the laterite district, Qiongshan, Hainan province in July 2003 and an experiment was conducted applying orthogonal design L18(37), with five factors (N? P? K ?Mg ?B) and three levels to examine the effect of mixed rate and volume of fertilizers on plant growth, fruit yield and fresh fruit quality of EksotiKa II Papaya. The experiment yielded the following results: (1) during florescence and preliminary fruit-producing period (90~240 days after planting), the application of N 15g/tree/once (applying once every 15days), P2O5 15g/tree/once, K2O 20g/tree/once, Mg 0.24g/tree/once, B 0.28g/tree/once would best promote the steady and healthy growth of the plants; (2) during florescence, fruit-producing period (240 days after planting), application of N 35g/tree/once (applying once every 15 days), P2O5 15g/tree/once, K2O 45g/tree/once, Mg 0.44g/tree/once, B 0.40g/tree/once could be in favor of high yield (45.33~47.58 tons/hm2/year) and the better quality of fresh fruits (sweet degree is 12.0%~12.6%).