腐植酸复合肥对油菜品质及生理指标的影响

针对长期大量施用化肥造成老菜园土壤养分失衡、蔬菜品质变劣等问题，研制了几种新型颗粒腐植酸复合肥供油菜土培与砂培试验应用，研究表明，所有施肥处理比对照有显著的增产效果，参试肥料间产量差异不显著。在投入养分量相等条件下，腐植酸能显著降低油菜体内磷酸盐含量，提高Ｖc、可溶性糖含量及ＳＯＤ、ＰＯＤ、ＮＲ活性，且以腐复肥４号（ＨＡ－ＮＰＫ－Ｚn)效果最好。腐植酸还能有效提高油菜体内叶绿素含量，使叶片增厚，外观油绿鲜美，商品价值提高。在土壤水分含量相等条件下，腐植酸能有效提高油菜的蒸腾强度，降低气孔阻力，从而保障水分及各种代谢活动旺盛。

Study the effect of humic acid (HA) compound fertilizer on the quality and physiologic index of rape

Fertilizer used in the old vegetable garden for a long time causing a lot of problems like the disequilibrium of soil nutrients, the deterioration of vegetable quality, so several new HA compound fertilizers were applied to rape (Brassica campestris L. ssp. chinensis L. Makino) in sandy and soil culture experiments. The results showed that all fertilizer treatments were notably out-weighted the CK and no significant different yield between the experimental fertilizers. With equal-nutritional quantity, HA compound fertilizer apparently decreased the NO_3-N content and increased Vc, soluble sugar content and SOD, POD, NR activities. Moreover, number 4 (HA-NPK-Zn) was the best among them. It also effectively enhanced the chlorophyll content and made the blade thick, glossy dark green and fresh, which improved the commodity value of rape. With equal soil-water content, the intensity of transpiration increased and the resistance of stoma decreased by HA compound fertilizer ensured the water or other metabolisms vigorously to rape.