[1]倪玉琼,张强,曹方琴,等.不同施氮量对高粱产量及植株养分积累的影响[J].水土保持研究,2016,23(05):95-99,105.
　NI Yuqiong,ZHANG Qiang,CAO Fangqin,et al.Effect of Different Nitrogen Concentrations on Sorghum bicolor Yield and Nutrient Accumulation[J].Research of Soil and Water Conservation,2016,23(05):95-99,105.
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不同施氮量对高粱产量及植株养分积累的影响

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 23 期数: 2016年05期 页码: 95-99,105 栏目: 出版日期: 2016-10-28
Title:
Effect of Different Nitrogen Concentrations on Sorghum bicolor Yield and Nutrient Accumulation
作者:
倪玉琼1, 张强1, 曹方琴2, 杨琳3
1. 黔东南州农业技术推广站, 贵州 凯里 556000;
2. 黄平县农技站, 贵州 黄平 556100;
3. 贵州大学 农学院, 贵阳 550025
Author(s):
NI Yuqiong1, ZHANG Qiang1, CAO Fangqin2, YANG Lin3
1. Qiandongnan Agricultural Technology Extension Station, Kaili, Guizhou 556000, China;
2. Huangping Agricultural Technology Extension Station, Huangping, Guizhou 556100, China;
3. College of Agriculture, Guizhou University, Guiyang 550025, China
关键词:
施氮量; 高粱; 产量; 养分积累
Keywords:
nitrogen concentration; Sorghum bicolor; yield; nutrient accumulation
分类号:
S143;S514;Q945
摘要:
利用控制性的大田试验栽培技术，连续2 a采用氮的添加试验，研究了不同施氮量（CK、低氮LN、中氮MN、高氮HN）对高粱（Sorghum bicolor）产量及植株养分积累的影响。结果表明：施氮处理下高粱植株株高、根长、叶面积指数、茎粗、地上和地下生物量均高于对照，随着氮浓度的增加，高粱植株生长各指标以中水平施氮（MN）处理下达到最大，说明施氮能够促进高粱的生长，但氮肥在高用量时可能会产生轻微抑制作用；施氮对高粱植株叶绿素、可溶性蛋白和可溶性糖含量均有明显的促进作用，不同施氮处理下高粱叶绿素a和b、可溶性糖和可溶性蛋白含量呈先增加后减小的趋势，说明施氮能够促进高粱叶片叶绿素合成；高粱植株不同部位的碳、氮、磷和钾积累量表现出较大的差异，穗部的碳、氮、磷和钾积累量最高，其次是叶片，根部碳、氮、磷和钾积累量最低，其中不同部位的碳、氮、磷和钾积累量均表现为MN > HN > LN > CK，由此表明了施氮能够增加高粱碳、氮、磷和钾的积累量；施氮对高粱植株养分的影响表现为一定程度的增加效应，随施氮量的增加高粱植株养分呈先增加后降低的趋势，表明了高粱植株在一定程度上对养分的累积作用，其增幅随施氮量的增加而增加。Pearson相关性分析表明，施氮量与株高、茎粗、单株叶面积、单株干重、籽粒产量、穗数和千粒重呈现出显著性相关关系，由此表明，施氮量与高粱主要性状以及养分吸收息息相关，在高粱高产高效栽培中起着重要的作用。
Abstract:
Two consecutive years of field experiments were used to study the effect of nitrogen concentration on Sorghum bicolor yield and nutrient accumulation to different nitrogen addition levels: control (CK), low nitrogen (LN), medium nitrogen (MN), high nitrogen (HN). The results indicated that the Sorghum bicolor height, root length, leaf area index, stem diameter, the ground and underground biomass were higher than CK, which showed the sequence: MN > HN > LN > CK, and illustrated that nitrogen addition could promote the growth of Sorghum bicolor, but high nitrogen addition may cause the slight inhibition. Nitrogen concentration promoted Sorghum bicolor chlorophyll, soluble protein and soluble sugar contents, which first increased and then decreased, which suggested that nitrogen concentration could promote the synthesis of chlorophyll. The carbon, nitrogen, phosphorus and potassium accumulation of different parts of Sorghum bicolor had the significantly difference which showed the order: spike > leaf > root, and different parts of the carbon, nitrogen, phosphorus and potassium accumulation decreased in the order: MN > HN > LN > CK, which showed that nitrogen concentration could increase the plant nutrient accumulation. The plant nutrient of Sorghum bicolor first increased and then decreased with nitrogen addition, which suggested that nitrogen concentration could increase the plant nutrient accumulation. Correlation analysis showed that the nitrogen concentration had the significant correlation with plant height, stem diameter, leaf area per plant, dry weight per plant, grain numbers per spike and grain yield, which indicates that nitrogen is closely related to Sorghum bicolor growth, and played an important role in high-yield cultivation.

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备注/Memo

收稿日期:2015-08-12;改回日期:2015-09-23。
作者简介:倪玉琼(1969-),女(土家族)贵州岑巩人,高级农艺师,主要从事农业技术推广工作。E-mail:155061712@qq.com

更新日期/Last Update: 1900-01-01