养殖污水和清水混灌对小麦苗期生长及土壤速效养分含量的影响

Effects of Livestock Farm Wastewater and Clear Water Combined Irrigation on Wheat Seedling Growth and Soil Available Nutrient Content

采用盆栽灌水的方法,研究了养殖污水和清水混灌对小麦苗期生长及土壤速效养分含量的影响。结果表明:小麦发芽所需时间随养殖污水灌溉量的增加而增加;灌溉适量(200 mL/kg)的养殖污水可以明显提高小麦的发芽率,并增加小麦地上部的干物重。随着养殖污水灌溉量的增加,土壤中的盐分、碱解氮、速效磷和速效钾的含量总体上均明显增加,并且主要积累到0～5 cm土层中;土壤中盐分、碱解氮和速效钾向下淋溶趋势明显。

The effects of livestock farm wastewater and clear water combined irrigation on the growth of wheat seedlings and the content of soil available nutrients were studied by pot irrigation experiment. The results indicated that the wheat germination time increased with the increase in the irrigation quantity of livestock farm wastewater. The irrigation of suitable quantity （200 mL/kg） of livestock farm wastewater could markedly enhance the germination rate of wheat, and increase the weight of overground dry matter of wheat. The contents of salinity, alkali - hydrolyzable nitrogen, available phosphorus and available potassium increased in the whole along with the increase of the livestock farm wastewater irrigation quantity, and they mainly run up to the soil layer from 0 to 5 cm. The salinity, alkali -hydrolyzable nitrogen and available potassium in the soil had a obvious downward leaching trend.