Contribution of Subsoiling in Fallow Period and Nitrogen Fertilizer to the Soil-water Balance and Grain Yield of Dry-land Wheat

Soil water conservation is crucial to the yield of dry-land wheat. The aim of this study was to explore an effective method to improve the water conservation and wheat yield in the Loess Plateau of Shanxi China. A two-factor split-plot design was performed in field with tillage practice (subsoiling...

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Published inInternational journal of agriculture and biology Vol. 17; no. 1
Main Authors He, Min Sun Zhi-qiang Gao Ai-xia Ren Yan Deng Wei-feng Zhao Hong-mei Zhao Zhen-ping Yang Li-heng, Zong, Yu zhen
Format Journal Article
LanguageEnglish
Published Faisalabad AsiaNet Pakistan (Pvt) Ltd 01.02.2015
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Summary:Soil water conservation is crucial to the yield of dry-land wheat. The aim of this study was to explore an effective method to improve the water conservation and wheat yield in the Loess Plateau of Shanxi China. A two-factor split-plot design was performed in field with tillage practice (subsoiling and no tillage) as main plot and nitrogen (N) application (75 150 and 225 kghm-2) as subplot. Soil water storage (SWS) yield and its components and precipitation use efficiency (PUE) were determined. In fallow period subsoiling increased the SWS in the 0300 cm soil depth. In the growth period subsoiling not only had a positive effect on water storage at the over-wintering jointing and booting stages but also accelerated the water utilization in the 060 cm soil depth during sowing-jointing and jointing-anthesis stage and in the 180300 cm depth during anthesis-maturity stage. Consequently yield and PUE were significantly improved by increasing the spike number and grain number per spike. Soil water storage declined as the concentration of N increased. Moreover subsoiling in fallow period combined with 150 kghm-2 N significantly increased the water utilization in the 060 cm depth at the early vegetative growth stage enhanced the water absorption by deep roots at late reproductive growth stages improved yield by increasing spike numbers and had a strong positive effect on PUE. Application of 150 kghm-2 N notably enhanced the promoting effects of subsoiling on soil water conservation water utilization and yield of dry-land wheat. Copyright 2014 Friends Science Publishers
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ISSN:1560-8530
1814-9596