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硫酸──碳铵CO_2施肥法,因其具有简便易行、便于操作施用等优点,目前已在冬暖棚蔬菜生产上大面积推广应用。关于该法施肥的增产效果已有很多报道,但对其有效作用时间和范围未见报道。为进一步完善硫酸──碳铵CO_2施肥配套技术,我们进行了该项试验。 一、试验方法 本试验于1996年1月在临沂市河东区冬暖型大棚中进行,栽培作物为番茄。硫酸、碳铵的用量根据冬暖型大棚的面积,以目前生产中普遍采用的1000uL/L,为浓度标准,按照方程式 2NH_4HCO_3+H_2SO_4→（NH_4）_2SO_4+2H_2O+2CO_2↑计算得到。浓硫酸与水按1:3的重量比稀释后放入小塑料盆,放在番茄行间,平均每亩设40个施放点。碳铵按理论用量分装到小塑料袋,扎数个小孔放入稀硫酸,产生 CO_2。利用 GXH-305型红外线分析以监测 CO_2浓度变化,监测点均在距植株顶部10-15cm处。
Sulfuric acid ─ ─ ammonium bicarbonate CO_2 fertilization method, because of its simple and easy, easy to operate and application of advantages, has been in the winter greenhouse vegetable production a large area to promote the use of. There have been many reports about the fertilization yield increasing effect of this method, but the time and range of its effective action have not been reported yet. To further improve the sulfuric acid ─ ─ ammonium bicarbonate fertilizer supporting technology, we conducted the test. First, the test method The test in January 1996 in Hedong District, Linyi City, winter warm shed, cultivated crops for the tomato. The dosage of sulfuric acid and ammonium bicarbonate was calculated according to the area of winter warm type greenhouse and 1000uL / L, which is commonly used in the current production, as the concentration standard according to the formula 2NH_4HCO_3 + H_2SO_4 → (NH_4) _2SO_4 + 2H_2O + 2CO_2 ↑. Concentrated sulfuric acid and water according to the weight ratio of 1: 3 diluted into small plastic pots, placed in tomato line, the average set 40 per acre point. Ammonium bicarbonate according to the theoretical amount of sub-packed into small plastic bags, tie a few holes into dilute sulfuric acid, produce CO_2. The GXH-305 infrared analysis was used to monitor changes in CO 2 concentrations at 10-15 cm from the top of the plant.