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采用土培试验研究了黄瓜专用缓释肥对黄瓜产量品质及N,P,K养分吸收利用、土壤酶活性的影响.结果表明:2种专用缓释肥(CSRF1和CSRF2)显著提高了黄瓜果实干物质量和总干物质量,CSRF1和CSRF2处理黄瓜果实干物质量较CCF,MSRF,OCF处理分别增加了23.3%~37.2%和16.5%~31.6%.2种专用缓释肥(CSRF2和CSRF1)提高了黄瓜果实的维生素C质量分数和氨基酸的质量分数,降低了硝酸盐质量分数.黄瓜根、茎、叶和果实的N,P,K养分质量分数均以CSRF2最高.黄瓜N,P,K积累量从大到小依次为CSRF2、CSRF1、MSRF、CCF、OCF,专用缓释肥处理的N,P,K积累量较MSRF,CCF和OCF处理分别提高了27.45%~46.55%,33.17%~56.20%和67.61%~102.13%.与普通复合肥相比,2种专用缓释肥处理的N,P,K相对养分利用效率分别增加了18.53%~24.20%,19.27%~20.02%和18.54%~35.69%.
Effects of cucumber special slow-release fertilizer on yield and quality, nutrient uptake and utilization of N, P and K and soil enzyme activity were studied by soil culture experiments.The results showed that two kinds of special slow release fertilizers (CSRF1 and CSRF2) significantly increased cucumber fruit The dry matter and total dry matter of CSRF1 and CSRF2 treatments increased by 23.3% -37.2% and 16.5% -31.6%, respectively, compared with CCF, MSRF and OCF treatments. The two special-purpose slow release fertilizers (CSRF2 and CSRF1) The contents of vitamin C and amino acids in cucumber fruits reduced the mass fraction of nitrate, while the contents of N, P and K nutrients in roots, stems, leaves and fruits of cucumber were the highest with CSRF2.The accumulation of N, P and K in cucumber Compared with the treatments of MSRF, CCF and OCF, the N, P, K accumulation of CSRF2, CSRF1, MSRF, CCF, OCF and special slow-release fertilizer increased from 27.45% to 46.55% and from 33.17% to 56.20% And 67.61% -102.13%, respectively.The relative N use efficiency of two kinds of special slow-release fertilizer treatments increased by 18.53% -24.20%, 19.27% -20.02% and 18.54% -35.69 %.