CAJ | 학술논문

为了研究高产灌溉条件下土壤耕作模式对还田玉米秸秆腐解的影响,在山东龙口采用4种土壤耕作模式(常规耕作秸秆还田、旋耕秸秆还田、耙耕秸秆还田、免耕秸秆覆盖)进行了一年两季田间试验,测定了秸秆腐解率、秸秆腐解速率和秸秆的纤维素含量.结果表明:秸秆腐解速率与土壤温度具有显著的相关性.旋耕秸秆还田和耙耕秸秆还田两种少耕模式和常规耕作秸秆还田模式的秸秆腐解率、平均秸秆腐解速率无显著差异,说明少耕模式并不因减少耕作程序而降低作物秸秆在田间的腐解.免耕模式的秸秆腐解率和腐解速度显著低于以上3种耕作模式,经过小麦和玉米两个生长季节后仍有37.78%的玉米秸秆剩余,而且秸秆中纤维素质量分数为20.69%,腐解质量差,会对下年作物的出苗产生影响.
위료연구고산관개조건하토양경작모식대환전옥미갈간부해적영향,재산동룡구채용4충토양경작모식(상규경작갈간환전、선경갈간환전、파경갈간환전、면경갈간복개)진행료일년량계전간시험,측정료갈간부해솔、갈간부해속솔화갈간적섬유소함량.결과표명:갈간부해속솔여토양온도구유현저적상관성.선경갈간환전화파경갈간환전량충소경모식화상규경작갈간환전모식적갈간부해솔、평균갈간부해속솔무현저차이,설명소경모식병불인감소경작정서이강저작물갈간재전간적부해.면경모식적갈간부해솔화부해속도현저저우이상3충경작모식,경과소맥화옥미량개생장계절후잉유37.78%적옥미갈간잉여,이차갈간중섬유소질량분수위20.69%,부해질량차,회대하년작물적출묘산생영향.
In order to research the effects of soil tillage patterns on decomposition of returning crops straw in wheat/maize farmlands of the irrigated high-yield farmland, four tillage patterns were adopted in Longkou city, Shandong Province, China for a whole year including winter wheat and maize growth seasons. Four tillage patterns were as follows: conventional tillage with straw returned (CS), rotary tillage with straw returned (RS), disk harrow tillage with straw returned (HS), no-tillage with straw covered (NC). Decomposition rate, decomposition speed and cellulose content of the returned straw were investigated. Results showed that the decomposition speed of the returned straw and soil temperature had a significant correlation; there was no significant difference between the decomposition rate of returned straw of RS, HS and CS, and it was the same case with decomposition speed of returned straw. Those phenomena showed that the two minimum tillage patterns (RS and HS) had not reduced straw decomposition because of reduced tillage compared with conventional tillage (CS). While decomposition rate and decomposition speed of returned straw of NC were significantly lower than those of CS, RS and HS. After the wheat growth season and maize growth season, 37.78% of the returned straw whose cellulose content was 20.69% was still remained, which may affect the emergence of wheat in the next year.