CAJ | 학술논문

在甘肃省石羊河绿洲灌区连续4 a冬小麦保护性耕作田间定位试验的基础上,用静态箱-气相色谱法研究了5种耕作措施下,冬小麦田从前季灌浆期到后季分蘖期期间CO_2排放通量的变化规律.结果表明:不同耕作措施下,CO_2排放通量在观测期内呈现"高-低-高"的双峰型变化曲线;秸秆翻压处理CO_2排放通量最高,传统耕作CO_2排放通量介于免耕不覆盖处理和秸秆翻压处理之间;传统耕作与免耕不覆盖两处理CO_2排放通量间差异性显著;CO_2排放通量与耕层(0～30 cm)土壤温度和土壤含水量呈显著正相关,其中土壤含水量对CO_2排放通量的影响大于土壤温度对其的影响.
재감숙성석양하록주관구련속4 a동소맥보호성경작전간정위시험적기출상,용정태상-기상색보법연구료5충경작조시하,동소맥전종전계관장기도후계분얼기기간CO_2배방통량적변화규률.결과표명:불동경작조시하,CO_2배방통량재관측기내정현"고-저-고"적쌍봉형변화곡선;갈간번압처리CO_2배방통량최고,전통경작CO_2배방통량개우면경불복개처리화갈간번압처리지간;전통경작여면경불복개량처리CO_2배방통량간차이성현저;CO_2배방통량여경층(0～30 cm)토양온도화토양함수량정현저정상관,기중토양함수량대CO_2배방통량적영향대우토양온도대기적영향.
Based on the four years field experiment on winter wheat with different tillage measures in Hexi Oasis Irrigation Area, the variations of CO_2 emission flux form five winter wheat fields under different tillage measures during former filling stage to later tillering stage were measured by static chamber-gas chromatographic techniques. The results were as follows: during observation period, the CO_2 emission flux under different tillage measures showed bimodal curve; the CO_2 emission flux of conventional tillage with stubble incorporated(TIS) was higher than any other treatments;the CO_2 emission flux of conventional tillage(T)was lower than that of conventional tillage with stubble incorporated(TIS),but higher than that of no-tillage without stubble retention(NT), significant differences of CO_2 emission flux were found between the conventional tillage(T)and no-tillage without stubble retention(NT); the CO_2 emission flux in the 0～30 cm soil layer was significantly correlated to the soil moisture and soil temperature.