硅喷施对自然条件下绿肥植物降解规律的影响  

Effect of Silicon Spraying on Degradation of Green Manure Crops under Natural Conditions

作　　者：张炳辰 姚凯 郭紫惠 王佳靓 黄嘉慧 卞云婷 闫洋 常春荣[1] Zhang Bingchen;Yao Kai;Guo Zihui;Wang Jialiang;Huang Jiahui;Bian Yunting;Yan Yang;Chang Chunrong(College of Tropical Crops Hainan University,Haikou,570228)

机构地区：[1]海南大学热带作物学院,海口570228

出　　处：《分子植物育种》2022年第2期529-535,共7页Molecular Plant Breeding

基　　金：国家重点研发项目(2017YFD0202100)资助。

摘　　要：利用尼龙网袋法研究硅喷施对田菁、假花生和蟛蜞菊降解特征。结果表明,喷施硅显著影响绿肥的降解速率,但未影响到绿肥在整个观测期降解速率的变化规律,不同绿肥对喷施硅的反应不同。与未喷施硅相比,喷施硅显著降低整个观测期假花生干物质、有机碳、氮、磷降解,还田后365 d分别降低10.2%、6.93%、12.3%和8.2%;喷施硅显著抑制还田前期蟛蜞菊干物质、有机碳、氮、磷的降解,还田后28 d分别降低18.9%、10.3%、82.4%和31.7%;田菁喷施硅肥则提高了前期干物质、有机碳降解率,但对氮、钾的降解影响不显著。3种绿肥钾的降解率在28 d均超过94%,喷施硅显著影响假花生和蟛蜞菊还田前期钾的释放,硅对后期钾的释放影响不显著。The nylon mesh bag method was used to study the degradation characteristics of Sesbania cannabina,Arachis duranensis and Sphagneticola calendulacea chrysanthemum by spraying silicon under natural conditions.The results showed that silicon by fertigation significantly affected the degradation rate of green manure, but did not affect its degradation change law during the observation period. Different green manures had different responses to spraying silicon, and that significantly reduced Arachis duranensis degradation rate of dry matter, organic carbon,nitrogen, and phosphorus during the entire observation period comparing with the treatment of spraying water, and decreased by 10.2%, 6.93%, 12.3%, and 8.2% respectively at 365 day after returning to field;but these inhibited effects only happen at early stage for Sphagneticola calendulacea chrysanthemum, decreased by 18.9%, 10.3%,82.4% and 31.7% respectively at 28 days after returning to field;contrarily spraying silicon increases distinctively degradation rate of Sesbania cannabina on dry matter, organic carbon, but there is indistinctive to degradation rate of phosphorus and potassium. Marked effect of spraying silicon on potassium release rate at the early stage for Arachis duranensis and Sphagneticola calendulacea chrysanthemum, though potassium degradation rate exceeded94% at 28 days, there is no significant effect at the later stage of observation period.

关 键 词：硅 喷施 绿肥 降解速率 

分 类 号：S142[农业科学—肥料学]