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作 者 ：李伏生1;康绍忠2

期 刊 ：植物营养与肥料学报 2002年 8卷 3期 页码：303-309

关键词：CO2浓度；土壤水分；氮肥；养分吸收；土壤速效养分；

Keywords:CO2concentration, soilmoisture, nitrogenfertilizer, nutrientuptake, soilavailablenutrient,

摘 要 ：研究了 2种CO₂浓度水平 ,2种土壤水分处理和 5种N肥施用水平对春小麦 (TriticumaestivumL cv DingxiNo. 8654)养分吸收和土壤速效养分的影响。结果表明 ,高CO₂浓度 (700 μmol·mol^-1)明显降低春小麦对氮(N)的吸收 ,低N时降低更为明显 ,但对磷 (P)、钾 (K)吸收的影响不明显。小麦对N、P、K吸收 ,干旱处理明显比湿润处理低。CO₂浓度增高对土壤速效N的影响与土壤水分状况有关。湿润处理 ,CO₂浓度增加的处理速效N量比当前CO₂浓度的处理低 ;而干旱处理 ,施N 50、100、150mg·kg^-1时 ,速效N则较高。高CO₂ 浓度对土壤速效P、K量的影响不明显 ,而低N和水分不足 ,土壤速效P、K量较高

Abstract:The study presented the effects of two atmospheric CO₂ concentrations (350 and 700 μmol/mol), two levels of soil moisture (wet and drought) and five rates of nitrogen fertilizer ( N 0,50,100,150,200 mg·kg^-1) on soil available nutriet content and nutrient uptake of spring wheat (Triticum aestivum L cv. Dingxi No. 8654). Results showed that high CO₂ concentration significantly reduced N uptake of wheat, especially in low N treatment, but had little effect on P and K uptake of wheat. N, P and K uptake by wheat were significantly lower in well-watered treatments compared with in drought treatments. The effects of CO₂ increased on soil available N depended on soil water status. In well-watered treatment, soil available N content was lower in the enriched CO₂ treatment compared with in the ambient CO₂ treatment, while in drought treatment, soil available N content was greater applied with N 50, 100, 150 mg·kg^-1. High CO₂ concentration had little effect on soil available P and K content, but soil available P and K content were significantly greater at low N supply and insufficient water condition than at adequate N and water under adequate P and K supply.

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