Spalding R F, Junk G A, Richard J J
Pestic Monit J. 1980 Sep;14(2):70-3.
During the 1978 irrigation season, 14 ground water samples were collected in the Central Platte region of Nebraska, an area known to have high nitrate-nitrogen (NO3--N) levels, and analyzed for the presence of 13 pesticide residues. Atrazine levels ranged from 0.06 microgram/liter to 3.12 microgram/liter and were correlated to NO3--N concentrations with a coefficient of r = +0.55. Nitrate-nitrogen concentrations were measured as indicators of deep percolation from irrigated lands and ranged from 17.1 mg/liter to 34.3 mg/liter. Alachlor levels ranged from less than 0.01 microgram/liter to 0.71 microgram/liter. The amounts of 2,4-D were indeterminate because of experimental problems. Levels of the herbicides silvex and EPTC were below the limits of detectability. Levels of the organochlorine insecticides endrin, gamma-BHC (lindane), dieldrin, DDT and its primary metabolite DDE, heptachlor and its primary derivative heptachlor epoxide, and methoxychlor were all below the detectable limits of 0.005-0.010 microgram/liter.
在1978年灌溉季节期间，在内布拉斯加州中普拉特地区采集了14份地下水样本，该地区已知硝酸盐氮（NO3--N）含量较高，并对其中13种农药残留进行了分析。阿特拉津含量在0.06微克/升至3.12微克/升之间，与NO3--N浓度相关，相关系数r = +0.55。硝酸盐氮浓度作为灌溉土地深层渗漏的指标进行测量，范围在17.1毫克/升至34.3毫克/升之间。甲草胺含量在低于0.01微克/升至0.71微克/升之间。由于实验问题，2,4 - D的含量无法确定。除草剂2,4,5 -涕和EPTC的含量低于可检测限度。有机氯杀虫剂异狄氏剂、γ-六六六（林丹）、狄氏剂、滴滴涕及其主要代谢产物滴滴伊、七氯及其主要衍生物环氧七氯和甲氧滴滴涕的含量均低于0.005 - 0.010微克/升的可检测限度。
