施肥对番木瓜植株叶柄养分含量的影响

采用L18(37)正交设计,探讨氮、磷、钾、镁、硼肥配施对EksokaⅡ品种番木瓜(Carica papaya Linnaeus)植株叶柄养分含量的影响.结果表明:施氮肥对植株叶柄含氮量的影响最大,其次为施磷、钾和硼肥.施镁肥则影响最小;施氮肥能明显提高叶柄中的含氮量,但当施氮量达35g/株·次时,效果不显著;施磷、钾肥有降低叶柄中含氮量的趋势.施磷肥对植株叶柄含磷量的影响最大,其次为施镁和钾肥,施硼和氮肥的影响最小,磷肥、硼肥施用量与叶柄中含磷量之间无明显的变化规律.施钾和镁肥对植株叶柄含钾量的影响最大.其次为施磷肥,施氮肥和硼肥的影响最小;在施钾肥25～45g/株·次的范围内,能显著提高植株叶柄中的含钾量.施氮和钾肥对植株叶柄含镁量的影响最大,其次为施镁肥和磷肥,施硼肥的影响最小;施氮肥能提高叶柄中的含镁量,但当施氮量达35g/株·次时,增量已不显著;施钾肥有降低叶柄含镁量的趋势,当施肥量达45 g/株·次时,叶柄中的含镁量显著下降.施镁肥对植株叶柄含硼量的影响最大,其次为施磷肥,施氮肥、硼肥和钾肥的影响最小:施磷肥15、25 g/株·次时,叶柄中的含硼量相同,但当施用量达35g/株·次时,叶柄中的含硼量则显著上升.镁肥施用量不宜过大,当施用量≥0.53g/株·次时,会造成叶柄中的氮、磷、钾、镁、硼含量下降.

The Effect of Fertilizer Application on Nutrient Contents in Papaya Petiole

An experiment of orthogonal design L1(837),with 5 factors(N,P,K,Mg,B) and three levels,was conducted to examine the effect of fertilizer application on nutrient(N,P,K,Mg,B) contents in papaya petiole of EksotikaII(Carica papaya Linnaeus).The results showed that N fertilizer had great effect on N content in papaya petiole,followed by P,K and B fertilizers,with the least being the Mg fertilizer.N application increased N content in papaya petiole,but the increment was not significant when the N was applied at ...