摘要
采用田间小区试验方法,探讨了山药与苜蓿和三叶草两种豆科绿肥作物间作对土壤化学性质和生物学性质以及土壤综合肥力的影响.结果表明:与山药单作相比,间作苜蓿和三叶草提高了0～20 cm和20～40 cm土层硝态氮、速效磷和速效钾含量,降低了山药根茎膨大初期和膨大盛期土壤p H和电导率.间作有助于提高山药整个生育期0～20 cm和20～40 cm土层土壤脲酶、碱性磷酸酶和过氧化氢酶活性以及土壤呼吸,但对蔗糖酶和脱氢酶活性影响不明显.采用隶属函数模型和主成分分析相结合的方法对间作山药收获期的土壤肥力进行综合分析,结果表明,间作两种豆科作物均具有显著提高山药田0～20 cm和20～40 cm土层土壤综合肥力的效果.通过间作豆科绿肥作物增加山药田的生物多样性是培肥山药田土壤、改善山药田土壤生态环境、缓解连作障碍的有效途径.
We investigated the effects of yam/leguminous crops intercropping on soil chemical and biological properties as well as soil comprehensive fertility in a field experiment. Results showed that compared with the monoculture, both yam/alfalfa and yam/clover intercropping increased the concentrations of nitrate nitrogen (N), available phosphorus (P) and available potassium (K) in the 0-20 cm and 20-40 cm soil layers, while reduced soil pH and electrical conductivity (EC) in early growth period and rhizome rapid expansion period of yam. Intercropping with leguminous crops enhanced the activities of urease, alkaline phosphatase and catalase, and also enhanced soil basal respiration in the 0-20 cm and 20-40 cm soil layers during the whole growth period of yam. There was no influence of intercropping on soil sucrase activity and dehydrogenase activity. The effects of intercropping with leguminous crops on soil fertility at yam harvest were further analyzed by combining the membership function model and principal component analysis. Results showed that intercropping with leguminous crops could significantly increase the soil comprehensive fertility in the 0-20 cm and 20-40 cm soil layers. Therefore, it might be an effective measure to improve soil fertility and environmental quality, as well as alleviate continuous cropping obstacles of yam by yam/leguminous crops intercropping through enhancing soil biological diversity.
作者
张月萌
王倩姿
孙志梅
牛劭斌
刘佳
马文奇
杨小中
ZHANG Yue-meng;WANG Qian-zi;SUN Zhi-mei;NIU Shao-bin;LIU Jia;MA Wen-qi;YANG Xiao-zhong(College of Resource and Environmental Science/Hebei Province Key Laboratory for Farmland Eco-environment,Hebei Agricultural University,Baoding 071000,Hebei,China;Professional Cooperative of Yam in Li County of Hebei,Baoding 071400,Hebei,China)
出处
《应用生态学报》
CAS
CSCD
北大核心
2018年第12期4071-4079,共9页
Chinese Journal of Applied Ecology
基金
河北省重点研发计划项目(17226912D)
国家重点研发计划项目(2016YFD0200403)资助~~
关键词
山药
间作
豆科作物
土壤化学性质
土壤生物学性质
土壤综合肥力
yam
intercropping
leguminous crop
soil chemical property
soil biological property
soil comprehensive fertility
作者简介
张月萌,女,1992年生,硕士研究生.主要从事新型肥料与高效施肥研究.E-mail:zyuemeng@163.com;通讯作者:孙志梅,E-mail:sunzhm2002@163.com
