热带豆科绿肥腐解特性探究

发布时间：2018-01-11 05:28

本文关键词：热带豆科绿肥腐解特性探究　出处：《热带作物学报》2016年08期 　论文类型：期刊论文

【摘要】：为更好地了解与利用热带豆科绿肥,利用埋袋法模拟研究了热区豆科猪屎豆属(Crotalaria Linn.)、紫云英属(Astragalus Linn.)、田菁属(Sesbania Scop.)、千斤拔属(Flemingia Roxb.)、山蚂蝗属(Desmodium Desv.)和木豆属(Cajanus DC.)6个属绿肥的腐解特性。结果表明:同科不同属的腐解动态差异主要体现在埋样后的60~120 d,其中猪屎豆属、紫云英属和田菁属的腐解变化曲线基本重合,经过360 d的腐解,有机碳残留量变幅为千斤拔属(1.02%)山蚂蝗属(0.78%)木豆属(0.68%)田菁属(0.59%)紫云英属(0.50%)猪屎豆属(0.49%),千斤拔属有机碳贡献量最大;营养期、开花期与结荚期3个生育期样本结果之间的相关系数r分别为0.989、0.996、0.983,生育期间,显著性成对比较结果 p值均为0.000,小于0.05,因此生育期与腐解进程密切相关,在绿肥的实际利用中应适时采割。此结果为热带豆科绿肥的实际应用提供参考。
[Abstract]:In order to better understand and utilize green manure in tropical legumes, the Crotalaria Linn. Astragalus Linn., Sesbania Scop. and Flemingia Roxb.). Desmodium Desv.and Cajanus DC.). The decomposition characteristics of 6 genera of green manure. The results showed that the decomposition dynamics of different genera in the same family were mainly reflected in 60 ~ 120 days after burial. Among them, the decay curve of Crotalaria, Violet and Sesbania basically overlapped, and after 360 days of decomposition. Organic carbon residues ranged from 1.02 to 0.78 in desmodium) 0.68 to Sesbania (0.59) and 0.50 to Crotalaria (. 0.49). The contribution of organic carbon is the largest. The correlation coefficient between the results of the three growth stages of vegetative period, flowering stage and pod-bearing stage was 0.989U 0.996c0.983, respectively, and the correlation coefficient was 0.983in the growth period. Significant pairwise comparison results of p values were 0.000, less than 0.05, so the growth period is closely related to the process of decomposition. In the actual utilization of green manure, it is necessary to harvest and cut in good time, which provides a reference for the practical application of tropical legume green manure.
【作者单位】：海南大学农学院;中国热带农业科学院热带作物品种资源研究所;
【基金】：中国热带农业科学院热带作物品种资源研究所研究生基金项目“热带豆科绿肥对土壤改良效果研究”(No.YJS-2008-S004)
【分类号】：S142.1
【正文快照】： 绿肥是一种优质有机肥料,是指所有能翻耕到土里作为肥料用的绿色植物[1]。绿肥作物中含有较多的有机质,平均为15%左右,尤其是豆科绿肥作物,对改良和培肥土壤都有较好的作用,又是可再生的生物资源,可为作物的高产优质奠定基础[2]。绿肥的利用既能缓解肥料与作物之间的供求矛盾,

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