籽粒苋绿肥在油茶林下的腐解及养分释放规律研究  

Regularities of Decompostion and Nutrients Releasse of Amaranthus hypochondriacus Green Manure Under Woodland of Camellia oleifera

作　　者：曾进[1] 吴吕奇 游璐[1] 王楚天 潘洋刘 郭晓敏[1] 胡冬南[1] Zeng Jin Wu Lvqi You Lu Wang Chutian Pan Yangliu Guo Xiaomin Hu Dongnan(Key Laboratory of Forest Cultivation in Jiangxi Province, College of Forestry, Jiangxi Agricultural University, Nanchang Jiangxi 330045, China Forest Tree Breeding Center of Jiangxi Province, Jiujiang Jiangxi 300500, China)

机构地区：[1]江西农业大学林学院江西省森林培育重点实验室,江西南昌330045 [2]江西省林木育种中心,江西九江300500

出　　处：《西南林业大学学报（自然科学）》2017年第4期97-102,共6页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家科技支撑项目(2012BAD14B14)资助

摘　　要：为探讨不同生长时期籽粒苋绿肥在油茶林下的腐解及养分释放规律,设置覆盖地表和埋压地下2种方式,研究现蕾期和成熟期籽粒苋绿肥碳、氮、磷、钾的释放规律。结果表明:现蕾期籽粒苋腐解速度快,腐解后干物质剩余少,覆盖地表与翻压地下累计腐解率分别为68.18%、71.11%,干物质腐解速度相当;氮、钾养分释放快,磷养分释放慢。成熟期籽粒苋腐解速度较慢,腐解后干物质剩余较多,覆盖地表与翻压地下累计腐解率分别为54.05%、70.66%,埋压地下干物质腐解速度明显快于覆盖地表;氮、钾养分释放较现蕾期相对要慢,磷养分释放相对较快。将籽粒苋用作绿肥,现蕾期籽粒苋氮肥肥效较好,且可作为油茶林的追肥;成熟期籽粒苋10月份后埋压土壤中作油茶林的基肥。To explore the regularity of decay and nutrient release for Amaranthus hypochondriacus green manure in Camellia oleifera at different growth stage. The paper set up covering the surface and burying ground in 2 ways, by measuring the release rule of carbon, nitrogen, phosphorus and potassium at the stage of budding and mature. The findings indicated that at budding stage, A.hypochondriacus had high decomposing speed and less residual amount of dry matters, returning on the soil surface or underground the release rate was 68.18% and 71.11% respectively, both had the equivalent decomposing speed of dry matter. A.hypochondriacus at budding stage had fast releasing of nitrogen and potassium, and low speed in phosphorus. While at mature stage, the decomposing speed was slowdown with mass of residual dry matters, the fertilizer effect of returning underground was better than that returning on the surface soil, the release rate was 70.66% and 54.05% respectively. The release of nitrogen and potassium was lower than that application at the budding stage, but the release of phosphorus was relatively high. Using A.hypochondriacus as green manure, the effect of A.hypochondriacus nitrogen fertilizer is good at budding stage, and it can be used as topdressing in C.oleifera. At mature stage, buried A.hypochondriacus in the soil can be used as base fertilizer for C.oleifera after October.

关 键 词：籽粒苋 绿肥 腐解 养分释放 现蕾期 成熟期 油茶林 

分 类 号：S718.55[农业科学—林学]