CAJ | 학술논문

保护性耕作的基本措施是秸秆还田和少免耕。本研究调查了山东省滕州和兖州保护性耕作的推广现状，估算了不同保耕形式对温室气体净减排和经济成本的影响。结果表明：秸秆还田和耕地方式关系密切，在增加玉米秸秆还田量时，农户会选择增加耕地次数和强度；在玉米秸秆全部焚烧和采取传统耕地条件下，农田温室气体排放为318 kgC/（hm2·a），而在全部还田结合免耕条件下，可以吸收和固定1459 kgCe/（hm2·a），表明此时的农田是温室气体的吸收汇，而且此时成本较全部还田＋传统耕地的成本下降了32％，为1050 CNY/（hm2·a）。这些结果表明，全部还田＋免耕是一项经济且环境友好的保护性耕作方式。
보호성경작적기본조시시갈간환전화소면경。본연구조사료산동성등주화연주보호성경작적추엄현상，고산료불동보경형식대온실기체정감배화경제성본적영향。결과표명：갈간환전화경지방식관계밀절，재증가옥미갈간환전량시，농호회선택증가경지차수화강도；재옥미갈간전부분소화채취전통경지조건하，농전온실기체배방위318 kgC/（hm2·a），이재전부환전결합면경조건하，가이흡수화고정1459 kgCe/（hm2·a），표명차시적농전시온실기체적흡수회，이차차시성본교전부환전＋전통경지적성본하강료32％，위1050 CNY/（hm2·a）。저사결과표명，전부환전＋면경시일항경제차배경우호적보호성경작방식。
Straw returning and minimum and no-till are fundamental practices of conservation tillage. In this study,the implement status of conservation tillage in Tengzhou and Yanzhou were investigated,and the influences of conservation tillage on greenhouse gas (GHG)emission and economic cost were estimated.The results showed that straw returning and tillage method were closely related to GHG emission and economic cost.In traditional tillage,with the increase of straw returning amount,the tillage times and strength increased. The GHG emission was 318 kgC/(hm2·a)under all corn straw burned combined with traditional tillage.How-ever,under all straw returning with no -till,the amount of carbon absorption and sequestration reached to 1 459 kgC/(hm2·a),and the cost was 1 050 CNY/(hm2·a),declined by 32% than that of all straw retur-ning with traditional tillage.In conclusion,all straw returning with no-till was a more economic and environ-ment-friendly conservation tillage type.