CAJ | 학술논문

基于山西省寿阳旱作试验区长期定位试验,以春玉米农田为研究对象,探讨了不同碳氮管理措施对春玉米农田土壤呼吸的影响及土壤呼吸与土壤温度的关系.结果表明：碳氮处理土壤呼吸高于无肥区,其中施用化肥105 kg?hm-2、秸秆3000 kg?hm-2、有机肥3000 kg?hm-2时,土壤呼吸速率最低,为2.24μmol?m-2?s-1,与无肥区差异不显著；施用化肥31 kg?hm-2、秸秆5121 kg?hm-2、有机肥4500 kg?hm-2时,土壤呼吸速率最高,达3.51μmol?m-2?s-1,高出无肥区72.0%.化肥、秸秆、牛粪编码值与土壤呼吸速率满足关系式 y＝2.2-0.1x1＋0.2x2-0.2x1 x3＋0.2x12＋0.1x22＋0.1x32,当化肥、秸秆、牛粪用量分别为131、1500、3750 kg?hm -2时,土壤呼吸速率达到最小值2.075μmol?m -2?s -1,该施肥配方可为当地春玉米生产施肥管理提供参考依据.土壤呼吸与土壤温度间存在 y＝aTb显著相关关系,可解释两者间变异的46.9%～81.2%, Q10变化范围为1.86～4.71.综上可知,合理的碳氮管理措施可有效控制 CO2的排放,并影响土壤呼吸对土壤温度的敏感性.
기우산서성수양한작시험구장기정위시험,이춘옥미농전위연구대상,탐토료불동탄담관리조시대춘옥미농전토양호흡적영향급토양호흡여토양온도적관계.결과표명：탄담처리토양호흡고우무비구,기중시용화비105 kg?hm-2、갈간3000 kg?hm-2、유궤비3000 kg?hm-2시,토양호흡속솔최저,위2.24μmol?m-2?s-1,여무비구차이불현저；시용화비31 kg?hm-2、갈간5121 kg?hm-2、유궤비4500 kg?hm-2시,토양호흡속솔최고,체3.51μmol?m-2?s-1,고출무비구72.0%.화비、갈간、우분편마치여토양호흡속솔만족관계식 y＝2.2-0.1x1＋0.2x2-0.2x1 x3＋0.2x12＋0.1x22＋0.1x32,당화비、갈간、우분용량분별위131、1500、3750 kg?hm -2시,토양호흡속솔체도최소치2.075μmol?m -2?s -1,해시비배방가위당지춘옥미생산시비관리제공삼고의거.토양호흡여토양온도간존재 y＝aTb현저상관관계,가해석량자간변이적46.9%～81.2%, Q10변화범위위1.86～4.71.종상가지,합리적탄담관리조시가유효공제 CO2적배방,병영향토양호흡대토양온도적민감성.
This research was conducted to explore the effects of C&N management and the main environmental factor, namely soil temperature on soil respiration during spring maize growth period. The results showed that comparing with no fertilizer treatment, carbon and nitrogen managements improved soil respiration obviously, and the emission of CO2 ( y) had been effec-tively controlled with the use of fertilizer ( x1 ) , straw ( x2 ) and manure ( x3 ) reasonably. The soil respiration could be predic-ted by the ternary quadratic equation y=2. 2-0. 1x1 +0. 2 x2 -0. 2x1 x3 +0. 2 x21 +0. 1 x22 +0. 1 x23 , when x1 =0. 5, x2 = -1, x3 =0. 5. It reached the minimum respiration rate value of 2. 075 μmol?m-2?s-1 , when the amount of fertilizer was 131 kg?ha-1 , straw amount was 1 500 kg?ha-1 , manure amount was 3 750 kg?ha-1 . The relationship between soil respiration and soil temperature was explained by the equation y=aTb , the variability between soil temperature and soil respiration rate could be explained was 46. 9% ~ 81. 2%; the range of temperature-sensitive coefficient Q10 was 1. 86 ~ 4. 71.