为突破氮肥利用率难以提高的瓶颈,选用液体肥替代常规肥料,旨在摸清液体肥与常规肥料施用对滴灌棉田土壤无机氮素转化的影响.2022年分别于新疆北疆8个地区(芳群农场,玛纳斯县兰州湾,昌吉市老龙河,红柳塘村,呼图壁红山村,昌吉市榆树沟,阜康市三工河乡,阜康市六运河)设置3个处理,分别为常规施肥、液体肥和减水10％+液体肥.结果表明,0～30 cm、30～60 cm 土层土壤硝态氮、铵态氮含量为减水10％+液体肥＞液体肥＞常规施肥;土壤硝态氮、铵态氮含量均表现为滴头正下方明显高于距离滴头38 cm、-38 cm;单位面积液体肥较常规肥料养分投入量减少19.4 kg/667m2,但液体肥提供硝态氮、铵态氮高于常规肥料.可见,液体肥替代常规肥料在无机氮素转化方面起到正效应.
Effect of Liquid Fertilizer Application on Soil Inorganic Nitrogen Transformation in Drip Irrigation Cotton Fields
To address the bottleneck in improving nitrogen fertilizer utilization efficiency,this study investigates the effects of liquid fertilizer compared to conventional fertilizer on inorganic nitrogen transformation in drip-irrigated cotton fields.This study was conducted in 2022 across eight regions of northern Xinjiang,including Fangqun Farm,Lanzhou Bay in Manas County,Laolong River in Changji,Hongliutang Village,Hongshan Village in Hutubi,Yushugou in Changji,Sangonghe Township in Fu-kang,and Liuhe Canal in Fukang.Three treatments were set up:conventional fertilization,liquid fertil-izer,liquid fertilizer with 10％water reduction.The findings were as follows:across all regions,the content of nitrate and ammonium nitrogen in the soil layers of 0-30 cm and 30-60 cm was as fol-lows:10％water reduction+liquid fertilizer＞liquid fertilizer＞conventional fertilization;regardless of the region,the content of nitrate and ammonium nitrogen in the soil below the emitter was signifi-cantly higher than that at 38 cm or-38 cm from the emitter;the nutrient input of liquid fertilizers per unit area decreased by 19.4 kg/667m2 compared to conventional fertilizers.Nevertheless,liquid fertilizers resulted in higher contents of nitrate and ammonium nitrogen than conventional fertilizers.The results demonstrate that liquid fertilizers can effectively replace conventional fertilizers and posi-tively influence inorganic nitrogen transformation in drip-irrigated cotton fields.
Liquid fertilizerNitrate nitrogenAmmonium nitrogenYieldCotton field
万方数据
维普
