甘蔗叶不同还田方式对土壤养分的影响

发布时间：2018-03-07 22:19

本文选题：还田方式　切入点：土壤　出处：《热带作物学报》2017年08期 　论文类型：期刊论文

【摘要】：为减轻秸秆焚烧所带来的环境问题和充分利用甘蔗叶资源,在大田环境下动态监测甘蔗叶粉碎、焚烧和深埋3种还田方式对土壤养分的影响。结果表明:甘蔗叶粉碎还田和深埋还田有利于甘蔗叶中有机碳及氮、磷、钾养分的缓慢释放;甘蔗叶焚烧还田提高了土壤碱解氮含量5.6~20.9 mg/kg和速效磷含量0.8~4.0 mg/kg,促进土壤中氮磷向有效态转化,焚烧还田初期显著增加了土壤速效钾的含量12.3~18.3 mg/kg,但焚烧会损失部分甘蔗叶中碳氮元素,也造成环境污染。综合分析认为甘蔗叶粉碎还田是比较省工、方便的处理方式。
[Abstract]:In order to reduce the environmental problems caused by straw burning and make full use of sugarcane leaf resources, dynamic monitoring of sugarcane leaf crushing was carried out in the field environment. The effects of burning and deep burying on soil nutrients were studied. The results showed that the slow release of organic carbon, nitrogen, phosphorus and potassium in sugarcane leaves was beneficial to the slow release of organic carbon and nitrogen, phosphorus and potassium from sugarcane leaves. Incineration of sugarcane leaves increased soil alkali-hydrolyzed nitrogen content of 5.6 ~ 20.9 mg/kg and available phosphorus content of 0.8 ~ 4.0 mg 路kg ~ (-1), and promoted the conversion of nitrogen and phosphorus to available form in soil. In the early stage of incineration, the content of available potassium in soil increased significantly by 12.3 ~ 18.3 mg 路kg ~ (-1) 路kg ~ (-1), but some carbon and nitrogen elements in sugarcane leaves were lost by incineration, which also caused environmental pollution.
【作者单位】：中国热带农业科学院环境与植物保护研究所;海南医学院热带医学与检验医学院;中国热带农业科学院农业机械研究所;
【基金】：公益性行业(农业)科研专项经费“作物秸秆还田技术”(No.201503136)
【分类号】：S158

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