| Effects of tillage and nitrogen on water consumption and dry matter accumulation for arid region grain and forage maize |
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| DOI：10.7606/j.issn.1000-7601.2018.01.27 |
| Key Words: tillage method Whole Field Surface Plastic Mulching and Double Ridge-Furrow planting sub-soiling tillage water consumption amounts dry matter amounts |
| Author Name | Affiliation | | ZHANG Ming-jun | Gansu Provincial Laboratory of Aridland Crop Sciences
Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
Yan'an Institute of Agricultural Sciences, Yan'an, Shaanxi 716000, China | | LI Ling-ling | Gansu Provincial Laboratory of Aridland Crop Sciences
Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | XIE Jun-hong | Gansu Provincial Laboratory of Aridland Crop Sciences
Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | REN Jin-hu | Gansu Provincial Laboratory of Aridland Crop Sciences
Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | Lamptey Shirley | Gansu Provincial Laboratory of Aridland Crop Sciences
Faculty of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Field experiments were conducted to study and compare the effects of four tillage methods combined with two nitrogen levels on water consumption characteristics and dry matter accumulation on maize. The treatments were: T1(conventional tillage), T2(rotary tillage), T3(sub-soiling) and T4(no tillage) with two nitrogen levels (N2: 200 kg·hm-2 mineral nitrogen, N3: 300 kg·hm-2 mineral nitrogen, arranged in a randomized complete block design. The results showed that compared with the nitrogen, tillage methods had a great effect on water consumption amounts and water reduction amounts. Sub-soiling treatment was beneficial to reduce water consumption from sowing to jointing stage and increase water consumption and water consumption percentage from jointing to grain filling stage. Sub-soiling compared with conventional tillage at 0～30 cm soil layer reduced water by 35.3% from sowing to jointing stages. Similarly, at 30～110 cm soil layer the amount of water reduced increased by 54.2% and 20.5% from jointing to flowering and flowering to grain filling stage. Maize dry matter accumulation at different development stages, biological yield and grain yield were highest under treatment of sub-soiling+300 kg·hm-2 mineralnitrogen. Sub-soiling+300 kg·hm-2 mineral nitrogen had no significant difference compared with sub-soiling+200 kg·hm-2 mineral nitrogen. Water use efficiency (WUE) was highest in no tillage+200 kg·hm-2 mineral nitrogen, however, there were no significant difference between no tillage+200 kg·hm-2 mineral nitrogen and sub-soiling+300 kg·hm-2 mineral nitrogen. Therefore, considering improved yield, water use efficiency and the use of fertilizer, sub-soiling+200 kg·hm-2 mineral nitrogen under Complete Film Surface Plastic Mulching and Double Ridge-Furrow technology may be considered as suitable in the Western Loess Plateau. |
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