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生态学杂志 ›› 2010, Vol. 29 ›› Issue (07): 1307-1313.

• 研究报告 • 上一篇    下一篇

补充灌溉及氮磷配施对冬小麦产量形成和水氮利用的影响

张益望1,2,刘文兆1,3**,王 俊4   

  1. 1中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100;2中国科学院研究生院, 北京 100039;3西北农林科技大学, 陕西杨凌 712100;4西北大学城市与资源学系, 西安 710127
  • 出版日期:2010-07-08 发布日期:2010-07-08

Effects of supplemental irrigation and nitrogen- and phosphorus fertilization on yield formation and soil water- and nitrogen use of winter wheat.

ZHANG Yi-wang1,2, LIU Wen-zhao1,3, WANG Jun4   

  1. 1State Key Laboratory of Soil Erosion and Dryland Farming in Loess Plateau, Institute of Soil and Water Conversation, CAS &MWR, Yangling 712100, Shaanxi,China;2Graduate University of |Chinese Academy of Sciences, Beijing 100039, China;3Northwest A &F University, Yangling712100, Shaanxi, China;4Department of Urban and Resource Science, Northwest University, Xi’an 710127, China
  • Online:2010-07-08 Published:2010-07-08

摘要: 采用裂区试验设计,对黄土塬区补充灌溉及不同氮磷配施条件下麦田土壤水分利用、氮素吸收及作物产量等进行了研究。结果表明:试验年份补充灌溉及氮磷配施分别提高冬小麦籽粒产量0~24.6%和134.1%~240.2%,方差分析表明,施氮是籽粒产量提高的主要因素,补充灌溉及施磷作用不显著;补充灌溉及不同施氮水平均显著增加冬小麦耗水量,补充灌溉能在一定程度减少冬小麦对土壤储水的利用,而氮磷配施显著增加土壤储水的消耗;补充灌溉处理水分利用效率(WUE)较雨养处理降低0.2~2.3 kg·mm-1·hm-2,但差异不显著,氮磷配施WUE较对照提高4.0~7.2 kg·mm-1·hm-2,达显著水平;冬小麦氮素积累量受施氮水平影响显著,低氮和高氮处理氮素积累量较对照分别增加26.9~33.4 kg·hm-2和60.9~66 kg·hm-2;补充灌溉能够促进地上部氮素吸收。本试验表明,补充灌溉与高氮高磷组合处理可获得高产及较高的水分利用效率;在底墒充足的平水年,影响研究区域作物产量、水分利用效率及氮素吸收等的主要因素是施氮水平。

关键词: 河流连续统特征, 香溪河, 附石藻类

Abstract: A split plot experiment was conducted to study the effects of supplemental irrigation and nitrogen (N)- and phosphorus (P) fertilization on the soil water utilization, Nuptake, and grain yield of Triticum aestivum on loess tableland.   In the study year, supplemental irrigation and N- and P fertilization increased the grain yield of T. aestivum by 0-24.6% and 134.1%-240.2%, respectively. Nitrogen fertilization was the main factor in improving the grain yield of T. aestivum, while supplemental irrigation and P fertilization had little effects. Supplemental irrigation and N fertilization increased the water consumption by T. aestivum significantly. Supplemental irrigation decreased the consumption of soil water to some extent, whereas N- and P fertilization increased the soil water consumption significantly. Supplemental irrigation decreased the water use efficiency (WUE) by 0.2-2.3 kg·mm-1·hm-2, compared with rain-fed treatment, but the difference was not significant. Nitrogen- and P fertilization increased the WUE by 4.0-7.2 kg·mm-1·hm-2, being significantly higher than the control (CK). The N uptake by T. aestivum  increased significantly with increasing N application rate, and the increment was 26.9-33.4 kg N·hm-2and 60.9-66 kg·hm-2 under low and high N application rates, respectively, compared with CK. Supplemental irrigation promoted the allocation of absorbed N in the aboveground parts of T. aestivum. Supplemental irrigation combined with high fertilization rates of N and P could obtain high yield and higher WUE. In the years with adequate soil moisture for sowing, the key factor affecting the grain yield, WUE, and N absorption of T. aestivum on loess tableland was the N fertilization rate.

Key words: River continuum characteristics, Xiangxi River, Epilithic algae