山苍子人工林营养诊断及施肥试验初探  

Leaf Nutrient Diagnosis of Litsea cubeba with DRIS

作　　者：谢家仪 XIE Jia-yi(Forest Bureau of Jiangle County,Jiangle Fujian 353300,China)

机构地区：[1]福建省将乐县林业局,福建将乐353300

出　　处：《青海农林科技》2018年第3期34-37,共4页Science and Technology of Qinghai Agriculture and Forestry

摘　　要：采用回归最优饱和设计法对1年生山苍子实生苗进行了施肥试验,运用DRIS诊断法对其叶片营养元素进行了研究。结果表明,以6~11月份山苍子叶片N、P、K元素浓度测定值为依据,成功制定了DRIS指数法的营养诊断标准,经检验取得了较高的诊断正确率。山苍子叶片N、P、K三元素浓度最佳比值范围为N/P=10.21±1.30,K/P=2.11±0.08,N/K=5.29±0.64;实验结果表明N、K肥对山苍子苗影响较P肥更大。运用DRIS法诊断得到的山苍子叶片养分浓度最佳比值范围将为山苍子的合理施肥,提高苗木生长量供科学依据。Fertilization experiments with an regression optimum saturation design were conducted in Jiangle County, Fujian province.The nutrients dynamics in the leaves of L.cubeba were studied with the application of diagnosis and recommendation integrated system （DRIS） method. Based on N, P and K concentrations in the leaves of L.cubeba from June to November, nutrition diagnosis standards of DRIS graphic and index methods were successfully established with high accuracy. The optimal N/P, K/P and N/K ratios were 10.21±1.30, 2.11±0.08, 5.29±0.64 respectively. Experimental results also showed that N and K fertilizer of L.cubeba seedlings impacts greater than the P fertilizer.The optimal nutrients ratios can provide scientific basis for rational fertilization and improving tree growth of L.cubeba.

关 键 词：山苍子 叶片营养 诊断施肥综合法 

分 类 号：S685[农业科学—观赏园艺]