【摘要】 以笋瓜(印度南瓜)龙园栗香为材料,研究了N、P、K不同肥料配比对笋瓜果实中铬(Cr3+)、果胶、戊糖3种物质含量的影响。结果表明:高氮肥(尿素450kg·hm-2)的各组合下果实中Cr3+、果胶和戊糖含量均显著降低。在正常追肥(N1P1K1)前提下,仅增施钾肥的处理(N1P1K2)果实中3种物质均显著增加,仅增施磷肥的处理(N1P2K1)果实中Cr3+和戊糖含量显著增加,同时增施钾肥和磷肥的处理(N1P2K2)更有利于果实中Cr3+的积累。综合来看,生产中采用N1P1K2(尿素225kg·hm-2+磷酸铵225kg·hm-2+硫酸钾300kg·hm-2)处理进行追肥,可提高笋瓜果实中Cr3+、果胶、戊糖的含量。更多还原

【Abstract】 Effects of different N, P and K fertilizer levels on pectin, chromium and pentose contents in winter squash(Cucurbita maxima Duch. ex Lam.)fruits were studied in the experiment using cultivar‘Longyuanlixiang’. The results showed that the contents of pectin, pentaose and Cr3+ in winter squash fruits decreased significantly under every treatments of high N fertilizer level(carbamide 450 kg·hm-2). Compared to CK(N1P1K1),the contents of 3 kinds decreased-sugar substance significantly increased under the treatment of only increasing K fertilizer level(N1P1K2), the contents of Cr3+ and pentaose significantly increased under the treatment of only increasing P fertilizer level(N1P2K1), the contents of Cr3+ increased under the treatment of increasing P and K fertilizer level(N1P2K2). In order to increase pectin, pentaose and Cr3+ contents in winter squash fruits, as super-addition fertilizer, the treatment of N1P1K2 could be used in winter squash production.更多还原