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设置灌水、施肥二因素,研究了滴灌条件下水肥耦合效应对青花菜产量、水分利用效率、品质、生理特性及土壤全氮的影响。结果表明,灌水量相同条件下,叶绿素和水势均值的基本趋势为F2水平>F1水平>F3水平>F4水平;施肥量相同,叶绿素、水势均值表现为W1水平>W2水平>W3水平。产量、水分利用效率和品质以W2F2处理较高,且水肥互作对产量和水分利用效率有显著影响。不同水肥耦合处理下,随土层加深,全氮逐渐减小;且在相同施肥水平下,随灌水量减少而减少;在相同水分条件下,土壤全氮随施肥量的减小呈先增加后降低趋势。综合评价,在滴灌条件下,W2F2处理为最优组合。
The factors of water and fertilizer coupling effect on the yield, water use efficiency, quality, physiological characteristics and soil total nitrogen of broccoli under drip irrigation were studied. The results showed that the basic trend of average chlorophyll and water potential was F2 level> F1 level> F3 level> F4 level under the same irrigation condition. The same amount of fertilizers and W1 level> W2 level> W3 level showed the same trend of chlorophyll and water potential. The yield, water use efficiency and quality of W2F2 were higher, and the interaction of water and fertilizer had a significant effect on yield and water use efficiency. Under the different water and fertilizer coupling treatments, with the deepening of the soil layer, the total nitrogen decreased gradually, and decreased with the decrease of irrigation water under the same fertilization level. Under the same water conditions, the soil total nitrogen increased firstly with the decrease of fertilizer application Reduce the trend. Comprehensive evaluation, drip irrigation conditions, W2F2 treatment for the optimal combination.