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刈割模式对喀斯特地区构树生物量及粗蛋白和粗脂肪含量的影响

赵庆霝/a>,夏玉芲/a>

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赵庆? 夏玉? 刈割模式对喀斯特地区构树生物量及粗蛋白和粗脂肪含量的影响[J]. 北京林业大学学报. doi: 10.12171/j.1000-1522.20210425
引用本文: 赵庆? 夏玉? 刈割模式对喀斯特地区构树生物量及粗蛋白和粗脂肪含量的影响[J]. 北京林业大学学报.doi:10.12171/j.1000-1522.20210425
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Zhao Qingxia, Xia Yufang. Effects of cutting mode on biomass, crude protein and crude fat of Broussonetia papyrifera in karst[J]. Journal of Beijing Forestry University. doi: 10.12171/j.1000-1522.20210425
Citation: Zhao Qingxia, Xia Yufang. Effects of cutting mode on biomass, crude protein and crude fat ofBroussonetia papyriferain karst[J].Journal of Beijing Forestry University.doi:10.12171/j.1000-1522.20210425
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doi:10.12171/j.1000-1522.20210425

  • 贵州大学新农村发展研究院，贵 贵阳 550025

基金项目:国家自然科学基金地区基金项目?2060339），贵州省林业青年项目（黔林科合J [2018] 06号）
详细信息
    作者简今

    赵庆霞，博士，副教授。主要研究方向：逆境下树木生理生态适应机制。Email９a href="//www.inggristalk.com/j/article/doi/10.12171/mailto:qxzhao@gzu.edu.cn">qxzhao@gzu.edu.cn　地址?50025贵州省贵阳市花溪区贵州大学西校区

    责任作耄

    夏玉芳，教授。主要研究方向：人工林经营管理。Email９a href="//www.inggristalk.com/j/article/doi/10.12171/mailto:yfxia0398@qq.com">yfxia0398@qq.com　地址：同三/span>

Effects of cutting mode on biomass, crude protein and crude fat ofBroussonetia papyriferain karst

摘要
  • 摘要: 目的构树是重要的生态和经济树种，在喀斯特地区大面积种植，但是目前刈割模式对其产量及品质的影响研究比较缺乏，导致构树经济林资源利用率低，产量和质量不高。本研究通过对不同刈割频度和留茬高度下构树生物量和营养品质的研究，明确最佳的刈割模式，为构树林采收利用提供依据、/sec> 方法本研究以贵州省贞丰县2年生构树饲用林为研究对象，分3个刈割频度（一年刈?次?次?次）?个留茬高度（齐地? cm、留?5 cm、留?0 cm）进行刈割处理，研究不同处理间发枝数，收获的枝、叶生物量，及粗蛋白、粗脂肪含量的差异、/sec> 结果一年刈?次和5次构树的发枝数明显高?次。随着刈割次数和留茬高度的增加，茎叶比逐渐降低。累积生物量、粗蛋白含量均不受刈割频次的影响，但在不同留茬高度间差异显著。其中，留茬30 cm时生物量最高，?.63 t/hm 2，齐地割时粗脂肪含量最高、/sec> 结论年刈? ~ 5次，构树产量和品质差异不大；留茬30 cm，构树生物量最好，但粗脂肪含量略有下降。因此，综合考虑成本等因素，推荐喀斯特地区构树饲用林采用一年刈? ~ 4次、留?0 cm的模式进行采收利用、/sec>

    Abstract: Objective Broussonetia papyriferais an important ecological and economic species, which is widely planted in karst areas. However, at present, research on the impact of cutting patterns on its yield and quality is seldom, resulting in low resource utilization, low yield and quality of Broussonetia papyriferastand. Therefore, this research study the effects of different cutting frequencies and stubble heights on the yield and nutrient content of paper mulberry, in order to determine the optimal cutting mode and guide the harvesting and utilization of Broussonetia papyrifera. MethodsResearch objects were two-year-old paper mulberry in Zhenfeng County, Guizhou Province. Three cutting frequencies (cutting 3 times, 4 times and 5 times a year) and three stubble heights (stubble 0 cm, 15 cm and 30 cm) were randomly set up. The number of sprouting, biomass of harvested branches and leaves, crude protein and crude fat content among different treatments were studied. ResultsThe number of resprouting of Broussonetia papyriferaunder 4 and 5 times cutting a year was significantly higher than 3 times. With the increase of cutting times and stubble heights, stem to leaf ratio decreased gradually. The biomass, crude protein were not affected by cutting frequency. However, stubble heights significantly affect biomass, and showed that biomass of stubble 30 cm was the highest (2.63 t/ha). The crude fat content of neat cutting was significantly higher than that of stubble 15 cm and 30 cm. ConclusionThere was little difference in yield and quality of Broussonetia papyriferaamong 3 ~ 5 times cutting a year. Yield with stubble of 30 cm was the highest, but the crude fat content decreased slightly. Therefore, it is recommended that cutting 3 ~ 4 times a year and stubble height 30 cm for harvesting and utilization in paper mulberry forage forest.

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  • ?nbsp; 1刈割频次和留茬高度对构树发枝数的影响

    大写字母表示同一刈割频次不同留茬高度之间差异显著，小写字母表示同一留茬高度不同频次之间差异显著＇i>P< 0.05）。下同。Different capital letters indicate that significant difference among stubble height under the same mowing frequency. Different small letters indicate that significant difference among mowing frequencies under the same stubble height (P< 0.05). The same as below.

    Figure 1.Influences of mowing frequency and stubble height on the resprouting of paper mulberry

    下载: 全尺寸图牆/a> 幻灯牆/a>

    ?nbsp; 2刈割频次和留茬高度对构树生物量的影响

    Figure 2.Influences of mowing frequency and stubble height on the biomass of paper mulberry

    下载: 全尺寸图牆/a> 幻灯牆/a>

    ?nbsp; 3刈割频次和留茬高度对茎叶比的影响

    Figure 3.Influences of mowing frequency and stubble height on the stem leaf ratio of paper mulberry

    下载: 全尺寸图牆/a> 幻灯牆/a>

    ?nbsp; 4刈割频次和高度对粗蛋白和粗脂肪含量的影响

    大写字母表示同一刈割频次不同留茬高度之间差异显著，小写字母表示同一留茬高度不同频次之间差异显著＇i>P< 0.05）。Different capital letters indicate that significant difference among stubble height under the same mowing frequency. Different small letters indicate that significant difference among mowing frequencies under the same stubble height (P< 0.05).

    Figure 4.Influences of mowing frequency and stubble height on crude protein and crude fat content

    下载: 全尺寸图牆/a> 幻灯牆/a>

    ?nbsp; 1不同频次刈割时间?/p>

    Table 1.Cutting time of different cutting frequency

    刈割次数
    Cutting frequency    		 刈割日期
    Cutting time    		 间隔朞br/>Interval time/d
    3 2017?5?2?017?8?7?017?0?2 50
    4 2017?5?2?017?7?2?017?9?2?017?0?2 42
    5 2017?5?2?017?6?9?017?8?7?017?9?4?017?0?2 38
    下载: 导出CSV

    ?nbsp; 2不同刈割频次下各茬次生物野/p>

    Table 2.Biomass of each stubble under different mowing frequencies t/hm 2

    刈割次数
    Cutting times    		 一?br/> 1st stubble 二茬
    2nd stubble    		 三茬
    3rd stubble    		 四茬
    4th stubble    		 五茬
    5th stubble    		 合计
    Total
    3 0.60 ± 0.08A 0.75 ± 0.24A 0.41 ± 0.09A 1.75 ± 0.32A
    4 0.50 ± 0.04B 0.54 ± 0.09B 0.64 ± 0.10B 0.18 ± 0.4A 1.86 ± 0.37A
    5 0.60 ± 0.11C 0.33 ± 0.06AB 0.30 ± 0.08AB 0.46 ± 0.16BC 0.06 ± 0.01A 1.79 ± 0.19A
    注：不同大写字母表示同一刈割频次下各茬次之间差异显著＇i>P< 0.05）。Note: Different capital letters indicate that significant difference among stubbles under the same mowing frequency (P< 0.05).
    下载: 导出CSV

    ?nbsp; 3不同刈割频次下各茬次粗蛋白和粗脂肪含野/p>

    Table 3.Crude protein and crude fat content of each stubble under mowing frequencies

    养分
    Nutrient    		 刈割次数
    Cutting times    		 一?br/>1st stubble 二茬
    2nd stubble    		 三茬
    3rd stubble    		 四茬
    4th stubble    		 五茬
    5th stubble
    粗蛋發br/>Crude protein/% 3 24.40 ± 0.44B 23.65 ± 0.94B 19.98 ± 0.65A
    4 24.69 ± 0.42C 19.12 ± 0.28A 25.47 ± 0.22C 22.70 ± 0.48B
    5 24.31 ± 0.48BC 25.31 ± 0.42BC 26.24 ± 0.71C 21.10 ± 0.98A 23.41 ± 0.64B
    粗脂?br/>Crude fat/% 3 11.75 ± 0.33B 8.01 ± 1.14A 9.53 ± 1.70AB
    4 12.07 ± 1.53B 8.41 ± 0.82A 11.47 ± 0.78AB 10.19 ± 0.83AB
    5 12.59 ± 0.93AB 11.54 ± 0.83AB 10.42 ± 0.98A 12.52 ± 0.88AB 13.89 ± 0.60B
    注：不同大写字母表示同一刈割频次下各茬次之间差异显著＇i>P< 0.05）。Note: Different capital letters indicate that significant difference among stubbles under the same mowing frequency (P< 0.05).
    下载: 导出CSV
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