连续三年施用麸酸有机复混肥对蜜柚产量、品质及土壤肥力性状的影响

Effects of continuous three-years stationary application of organic compound fertilizer of monosodium glutamate on yield,quality of grapefruit and soil fertility property

在蜜柚上连续3年施用麸酸有机复混肥或麸酸有机复混肥与化肥不同比例配施,在等养分条件下,其产量均较单施化肥有不同程度的提高,年均增幅为6.0%~12.0%,其中以75%麸酸有机复混肥+25%化肥处理产量最高,同时,配施麸酸有机复混肥的蜜柚裂果率有所下降,而果实Vc、可溶性固形物含量均有不同程度的提高;麸酸有机复混肥与化肥不同比例配施以75%麸酸有机复混肥+25%化肥处理经济效益最高,其3年年均效益较单施化肥提高8.3%,但其土壤速效养分含量相对较低。

A three - years stationary experiment was conducted in the field to study the efficiencies of organic compound fertilizer of monosodium glutamate on grapefruit, as well as compounded with inorganic fertilizer. The results showed that the yield of grapefruit was improved by applying organic compound fertilizers of monosodium glutamate, either compounded with inorganic fer- tilizer at same nutrient element level. Compared with the CK （treatment of inorganic fertilizer）, the yield of grapefruit was annu- ally higher by 6.0% - 12.0%, thereinto, the yield of treatment of 75% of organic compound fertilizers compounded with 25% of inorganic fertilizer was highest. Furthermore, applying organic compound fertilizers could reduce the percentage of splitting fruit and improve Vc and dissoluble solid of fruit. In different proportion of organic compound fertilizer of monosodium glutamate com- pounded with inorganic fertilizer, the highest pro^t was the treatment of 75 % of organic compound fertilizer compounded with 25% of inorganic fertilizer, which improved by 8.3% than the treatment of inorganic fertilizer for three - years average profit, but its content of soil available N was comparatively low.