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为研究我国梨产区灌溉水矿质元素含量,以国家梨产业技术体系14个试验站78个灌溉水样品为试材,测定了pH、NH_4~+、NO_2~-、NO_3~-、PO_4~(3-)、K~+、Ca~(2+)、Mg~(2+)、SO_4~(2-)、Fe、Mn、Cu、Zn和B的含量,并对其分布规律及相关性进行了分析。结果表明,灌溉水pH平均值为7.74,pH大于7.5以上碱性水占供试样品的75.64%。参照GB5084-2005对农田灌溉水质的规定,灌溉水pH有4个样品不符合要求;在选择性控制项目中,灌溉水B含量有5个样品不符合要求。灌溉水中pH值与Cu呈极显著负相关。NO_3~-与Ca~(2+);K~+与Ca~(2+)、Mg~(2+)、SO_4~(2-);Ca~(2+)与Mg~(2+)、SO_4~(2-);Mg~(2+)与SO_4~(2-)都呈极显著正相关。
In order to study the content of mineral elements in irrigation water of pear producing area in our country, 78 irrigation water samples from 14 experimental stations of national pear industry technology system were used as materials to measure the contents of pH, NH_4 ~ +, NO_2 ~ -, NO_3 ~ -, PO_4 ~ The contents of K ~ +, Ca ~ (2 +), Mg ~ (2 +), SO_4 ~ (2 -), Fe, Mn, Cu, Zn and B were measured and their distribution and correlation Analysis. The results showed that the average pH value of irrigation water was 7.74, and the alkaline water above pH 7.5 accounted for 75.64% of the test sample. According to GB5084-2005 on irrigation water quality regulations, irrigation water pH 4 samples do not meet the requirements; in the selective control project, irrigation water B content of 5 samples do not meet the requirements. There was a significant negative correlation between pH and Cu in irrigation water. The contents of NO_3 ~ - and Ca ~ (2 +), K ~ + and Ca ~ (2 +), Mg ~ (2 +), SO_4 ~ SO_4 ~ (2 -); Mg ~ (2+) and SO_4 ~ (2-) showed extremely significant positive correlation.