摘要
本文通过对黄淮海平原地区玉米生长季土壤呼吸的测定表明:该地区土壤呼吸日变化呈现单峰曲线;土壤呼吸季节变化大体呈现随温度变化的趋势,最大值出现在8月10日左右;土壤呼吸受5cm地温的影响最大,达到极显著水平。施有机肥对土壤呼吸影响较大,氮磷配施也增加了土壤呼吸量,免耕比耕翻有较少的土壤呼吸量。运用DNDC模型模拟土壤呼吸变化趋势和土壤呼吸变化通量均与田间实测的比较接近,可以用来模拟分析黄淮海平原地区农业土壤碳氮的循环。
Absrtact: This paper studied soil respiration of summer-corn field in Huanghuaihai plain. The results indicated diurnal changes of soil respiration in this area appeared single one peak curve and the highest value emerged about at 13:00. Seasonal changes of soil respiration varied with temperatures changes trend and the highest value appeared about on August 10th. Soil respiration was influenced most by 5cm's ground temperature and reached the extremely significant level. Study showed the greatest influence soil respiration is organic fertilizer. Nitrogen mixing phosphorus also increased soil respiration and no tillage reduced soil respiration. The results of simulation for soil respiration trends with DNDC model were similar to the results of field measure. The DNDC model can be used to simulate the agricultural soil carbon nitrogen circulation for Huanghuaihai plain.
出处
《土壤肥料》
CSCD
北大核心
2002年第6期13-17,共5页
Soils and Fertilizers
基金
黄淮海平原曲周试区"十五"攻关课题"黄淮海平原高产区优质
高效农业结构模式与技术研究"。
