中国土壤与肥料
中國土壤與肥料
중국토양여비료
SOIL AND FERTILIZER SCIENCES IN CHINA
2015年
3期
1-5
,共5页
黎英华%姚云峰%郭洋洋%王欣
黎英華%姚雲峰%郭洋洋%王訢
려영화%요운봉%곽양양%왕흔
梯田%有机碳密度%地形因子%农作物类型
梯田%有機碳密度%地形因子%農作物類型
제전%유궤탄밀도%지형인자%농작물류형
terraced field%organic carbon density%terrain factors%crop types
针对北方半干旱地区小流域内旱地梯田的地形因子以及农作物类型对土壤有机碳密度的影响进行了研究,为合理地保障农作物生产和维持小流域的生态安全提供理论依据。试验地点在敖汉旗大五家流域,在流域内选取样地25块,共计125个土壤剖面,主要针对地形因子和农作物类型来分析其对土壤有机碳密度的影响,并得出以下结论:(1)玉米、高粱、谷子和绿豆4种作物的土壤有机碳密度随土壤深度的增加呈先下降再上升的趋势,在50~100 cm 深度时土壤有机碳密度最大;(2)玉米、高粱、谷子和绿豆4种作物的土壤有机碳密度在不同的海拔高度表现不同,海拔为400~500 m 时土壤碳密度最大,其次为海拔≥600 m 的区域,海拔为500~600 m 的区域最小;(3)玉米、高粱、谷子和绿豆4种作物的土壤有机碳密度随坡度的增大均呈现先下降后升高的趋势,坡度≤2°时土壤有机碳密度最小,在坡度为2~6°时最大;(4)在 p <0.05水平下,玉米、高粱、谷子和绿豆4种作物的土壤有机碳密度在不同坡向表现不同,谷子和玉米为南坡>北坡>西坡>东坡,而高粱和绿豆则为北坡>南坡>西坡>东坡;(5)玉米、高粱、谷子和绿豆4种作物中,绿豆的有机碳密度高于其他3种作物,平均土壤有机碳密度为0.81 g·cm -2。
針對北方半榦旱地區小流域內旱地梯田的地形因子以及農作物類型對土壤有機碳密度的影響進行瞭研究,為閤理地保障農作物生產和維持小流域的生態安全提供理論依據。試驗地點在敖漢旂大五傢流域,在流域內選取樣地25塊,共計125箇土壤剖麵,主要針對地形因子和農作物類型來分析其對土壤有機碳密度的影響,併得齣以下結論:(1)玉米、高粱、穀子和綠豆4種作物的土壤有機碳密度隨土壤深度的增加呈先下降再上升的趨勢,在50~100 cm 深度時土壤有機碳密度最大;(2)玉米、高粱、穀子和綠豆4種作物的土壤有機碳密度在不同的海拔高度錶現不同,海拔為400~500 m 時土壤碳密度最大,其次為海拔≥600 m 的區域,海拔為500~600 m 的區域最小;(3)玉米、高粱、穀子和綠豆4種作物的土壤有機碳密度隨坡度的增大均呈現先下降後升高的趨勢,坡度≤2°時土壤有機碳密度最小,在坡度為2~6°時最大;(4)在 p <0.05水平下,玉米、高粱、穀子和綠豆4種作物的土壤有機碳密度在不同坡嚮錶現不同,穀子和玉米為南坡>北坡>西坡>東坡,而高粱和綠豆則為北坡>南坡>西坡>東坡;(5)玉米、高粱、穀子和綠豆4種作物中,綠豆的有機碳密度高于其他3種作物,平均土壤有機碳密度為0.81 g·cm -2。
침대북방반간한지구소류역내한지제전적지형인자이급농작물류형대토양유궤탄밀도적영향진행료연구,위합리지보장농작물생산화유지소류역적생태안전제공이론의거。시험지점재오한기대오가류역,재류역내선취양지25괴,공계125개토양부면,주요침대지형인자화농작물류형래분석기대토양유궤탄밀도적영향,병득출이하결론:(1)옥미、고량、곡자화록두4충작물적토양유궤탄밀도수토양심도적증가정선하강재상승적추세,재50~100 cm 심도시토양유궤탄밀도최대;(2)옥미、고량、곡자화록두4충작물적토양유궤탄밀도재불동적해발고도표현불동,해발위400~500 m 시토양탄밀도최대,기차위해발≥600 m 적구역,해발위500~600 m 적구역최소;(3)옥미、고량、곡자화록두4충작물적토양유궤탄밀도수파도적증대균정현선하강후승고적추세,파도≤2°시토양유궤탄밀도최소,재파도위2~6°시최대;(4)재 p <0.05수평하,옥미、고량、곡자화록두4충작물적토양유궤탄밀도재불동파향표현불동,곡자화옥미위남파>북파>서파>동파,이고량화록두칙위북파>남파>서파>동파;(5)옥미、고량、곡자화록두4충작물중,록두적유궤탄밀도고우기타3충작물,평균토양유궤탄밀도위0.81 g·cm -2。
This paper studied effects of dryland terrace and crop types on soil organic carbon density in the watershed in north-ern semi-arid area. It provided theoretical guidance for reasonable farming and ecological safety in small watershed. 25 sample plot and 125 soil profiles in Dawujia small watershed in Aohan county of Chifeng in Inner Mongolia were selected in this study. The following results were obtained: (1) Soil organic carbon density for maize, sorghum, millet and mung bean decreased with soil depth and then increased, the maximum soil carbon density was in the depth of 50 ~ 100 cm; (2) The soil organic carbon density for all the four kinds of crops were reached the maximum at the elevation of 400 ~ 500 m areas, followed by an altitude of more than 600 m, and it was the lowest at the elevation of 500 ~ 600 m region; (3) The maximum soil organic car-bon density of four kinds of crops was in the areas of 2 ~ 6°, and the minimum soil organic carbon density was in the areas of≤2°; (4) In the level of P < 0. 05, the soil organic carbon density for four kinds of crops changed different in different slope. Soil organic carbon density for maize and millet showed a trend of south slope > north slope > west slope > east slope, and the sorghum and mung bean the trend was north slope > south slope > west slope > east slope; (5) The soil organic carbon density of mung bean was higher than other crops, with an average soil organic carbon density of 0. 81 g·cm - 2 .