40%增效乙-阿混剂防除玉米田杂草试验研究报告

Ingredient Selection of Urea Corn-Molasses Mineral Lick Block and Study on Its Utilization to Yanbian Yellow Cattle

摘要:

增效乙-阿混剂是我院研制开发的玉米田新型除草剂。该药剂由阿特拉津及乙草胺、二，四滴-丁酯等除草剂和助剂按科学比例混合而成。该混剂于1993-1996年在吉林省东丰、永吉、辉南、梅河、通化、柳河、集安等市县和辽宁省清源、抚顺、西丰、新滨等市县共55个点大面积试验示范，结果表明增效乙-阿混剂施用量为4.5-5.0kg/hm²，对玉米田阔叶杂草和禾本科杂草的防效稳定在92%以上。施药期为播种后至出苗前和玉米3-5叶期，对水进行土壤封闭处理和茎叶处理，对玉米生长发育及翌年种大豆均无影响。增效乙-阿5kg/hm²处理，比吉林、宣化产的乙-阿同剂量处理降低成本11.375元/hm²，比人工除草增产2101kg/hm²，累计增产玉米1.0925亿公斤(2101kg×52000hm²)，玉米按0.74元/kg计算，累计增加经济效益可达8084.5万元，社会效益更可观。

Abstract:

The 3 * 3 orthogonal trial was used two times to study the effect of different ingredients on the hardness and deliqescence of urea com-molasses mineral lick block (UMMB). The result revealed that cement, premix, moisture content, ruea, com-melasses and bentonite were with the best proportion by 12%, 18%, 310 mL, 16%, 12%, 14%, respectively. The hardness is 52.41 ± 1.19 kg/cm². The deliqescence is 2.13 % ± 0.45%.
Sixteen crossed yanbian Yellow Cattles of about 17 months of age were divided randomly into four groups in order to study the utilization of UMMB in practice. All the animals were offered the same concentrate mixture. However, the animals in group Ⅰ, group Ⅱ, group Ⅲ had free access to UMMB Ⅰ, Ⅱ, Ⅲ, respectively. Afer sixty days of feeding experiment. Live weight gains (kg/day） were higher significantly (P ＜ 0.01) in proup Ⅰ (0.72）, group Ⅱ (0.91) and proup Ⅲ (0.84) than the control group (0.51). The animals in group Ⅰ, group Ⅱ, group Ⅲ took in 201.4 ± 3.48, 184.7 ± 5.33, 177.5 ± 5.60 g/day lick block. The digestibility coefficient of OM, CP and CF was significanily (P ＜ 0.01) higher in group Ⅰ, Ⅱ, Ⅲ. Lick block supplementation enhanced the intake of crude feeding (P ＜ 0.01). It enhanced NH₃ concentration in blood. But, the increases were non-sighficanily different (P ＞ 0.05). Lick block supplementation can’t cause toxication.