Effects of alternate partial root-zone irrigation on yield and water use of sticky maize with fertigation

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• 作者：Hailing Liang ; Fusheng Li ; ^{lpfu6@163.com} ; ^{lpfu66@gmail.com} ; Mengling Nong
• 关键词：Fertigation ; Partial root-zone irrigation ; Sticky maize ; Yield ; Water-use efficiency
• 刊名：Agricultural Water Management
• 出版年：2013
• 出版时间：1 January, 2013
• 年：2013
• 卷：116
• 期：Complete
• 页码：242-247
• 全文大小：528 K

文摘

To investigate an efficient mode of water and fertilizer supply, a pot experiment was conducted to study the effects of alternate partial root-zone irrigation on dry mass accumulation, yield and water use of sticky maize with fertigation. Three irrigation methods, i.e. conventional irrigation (CI), alternate partial root-zone irrigation (APRI) and fixed partial root-zone irrigation (FPRI), and three fertilization methods, i.e. 100 % of total fertilizer (0.2 g N, 0.15 g P₂O₅ and 0.2 g K₂O kg^?1 soil) as basal fertilizer (F1), 100 % of total fertilizer (0.2 g N, 0.15 g P₂O₅ and 0.2 g K₂O kg^?1 soil) as basal fertilizer and topdressing with irrigation water (F2), 80 % of total fertilizer (0.16 g N, 0.12 g P₂O₅ and 0.16 g K₂O kg^?1 soil) as basal fertilizer and topdressing with irrigation water (F3), were designed. Results show that compared to CI, APRI decreased more water consumption than total dry mass of sticky maize, thus increased water-use efficiency (WUE) on the basis of total dry mass. Compared to F1, F2 increased dry seed yield of sticky maize under APRI, thus WUE on the basis of dry seed (WUE_s) and WUE_s per unit fertilizer were also increased. Therefore sticky maize with 100 % of total fertilizer as basal fertilizer and topdressing with irrigation water is an efficient mode of water and fertilizer supply under APRI in this study.