| Effect of irrigation at different growth stages and nitrogen fertilization on growth and yield of spring wheat in Hexi area |
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| DOI：10.7606/j.issn.1000-7601.2010.03.01 |
| Key Words: spring wheat irrigation at different growth stages yield nitrogen fertilization |
| Author Name | Affiliation | | KOU Wenping | Key Laboralory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas，Ministry of Education, Nonthwest A & F University，Yangling, Shaanxi 712100, China | | ZHANG Fucang | Key Laboralory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas，Ministry of Education, Nonthwest A & F University，Yangling, Shaanxi 712100, China | | FENG Leilei | Key Laboralory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas，Ministry of Education, Nonthwest A & F University，Yangling, Shaanxi 712100, China | | ZHANG Peng | Key Laboralory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas，Ministry of Education, Nonthwest A & F University，Yangling, Shaanxi 712100, China | | WU Lifeng | Key Laboralory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas，Ministry of Education, Nonthwest A & F University，Yangling, Shaanxi 712100, China |
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| Abstract: |
| The field experiment was conducted and four nitrogen levels and six irrigation treatments at different growth stages were designed to study the effect of irrigation at different growth stagee and nitrogen fertilizer on growth and
yields of spring wheat in Hexi area. The results showed that there had significantly effect on plant height, leaf area index(LAI) and dry matter accumulation of no irrigation treatments at the seedling stage, jointing stage, heading and filling stage, seding stages + heading and filling stage compared with the treatment of irrigation at whole growth stages(CK), the treatments of no irrigation at the seedling stage and seedling stages + heading and filling stage had more significant impuct on plant height, leaf are index(LAI) and dry matter accumulation. At the average nitrogen rate, comnpared with CK, the yield of spring wheat was decreases by 25.63%、11.88%、13.67%、10.38% and 34.06%，respectively, with the no irrigation treatments of seedling, jointing, heading, grain filling stage, the seedling stage + filling stage, a significant effect on spring stage, followed by the no irrigation in heading and jointing stage + filling stage. There had significantly improve effect on plant height, leat area index(LAI), dry matter accumulation, harvest index(HI) kernel number, effective number of per spike/m2 and yields of the spring wheat with nitrogen fertilization rate increases. |
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