首页 > 分享 > 氮肥添加对内蒙古温带草甸草原牧草营养品质与群落结构的影响

氮肥添加对内蒙古温带草甸草原牧草营养品质与群落结构的影响

花匠小妙招
2025-05-02 17:25

图 1 2019－2021年降水量与气温

Figure 1. Precipitation and temperature in from 2019 to 2021

图 2 试验设计

CK、N1、N2、N3、N4分别表示施肥0、6、12、20、32 g·m−2，下同。

Figure 2. Experimental design

CK, N1, N2, N3, and N4 indicate fertilizer application of 0, 6, 12, 20, and 32 g·m–2, respectively. This is applicable for the following figures and tables as well.

图 3 不同年份对牧草营养成分的单因素方差分析

不同小写字母表示不同年份之间差异显著(P < 0.05)，图5同。

Figure 3. One-way analysis of variance on forage nutrients in different years

Different lowercase letters indicate significant differences among different years at the 0.05 level. This is applicable for Figure 5 as well.

图 4 不同施肥量对牧草营养成分的单因素方差分析

不同小写字母表示不同施肥处理之间差异显著(P < 0.05)。

Figure 4. One-way analysis of variance on plant forage nutrients with different fertilization amounts

Different lowercase letters indicate significant differences among different fertilizer treatments at the 0.05 level.

图 5 不同年份对植物多样性单因素方差分析

Figure 5. One-way analysis of variance on plant diversity in different years

表 1 不同年份、施肥方式和施肥量对牧草中性洗涤纤维、酸性洗涤纤维、粗蛋白和相对饲用价值的方差分析(P值)

Table 1 Three-way analysis of different years, fertilization methods, and fertilization amounts on neutral detergent fiber, acidic detergent fiber, crude protein, and relative feed value of forage (P value)

变异来源
Source of variation 中性洗涤纤维
Neutral detergent fiber 酸性洗涤纤维
Acidic detergent fiber 粗蛋白
Crude protein 相对饲用价值
Relative feeding value 年份 Year (Y) < 0.000 1** < 0.000 1** < 0.000 1** < 0.000 1** 施肥方式 Fertilizer method (Fm) 0.948 2 0.137 0 0.584 0 0.385 6 施肥量 Fertilizer rate (Fr) 0.186 9 0.205 9 < 0.000 1** 0.070 5 Y × Fm 0.600 4 0.042 1* 0.699 4 0.813 8 Y × Fr 0.283 9 0.782 5 0.007 3** 0.385 6 Fm × Fr 0.805 5 0.589 7 0.573 9 0.818 9 Y × Fm × Fr 0.819 8 0.298 8 0.344 1 0.906 7 　*和**分别表示在0.05和0.01水平下达到显著水平，表2同。
　* and ** indicate significance levels at 0.05 and 0.01 levels. This is applicable for Table 2 as well.

表 2 不同年份、施肥方式和施肥量对植物多样性的三因素方差分析(P值)

Table 2 Three-factor variance analysis of plant diversity with different years, fertilizer methods, and fertilizer rate (P value)

变异来源
Source of variation Margalef丰富度指数
Margalef index Pielou均匀度指数
Pielou index Simpson优势度指数
Simpson index Shannon-Wiener多样性指数
Shannon-Wiener index 年份 Year (Y) < 0.000 1** < 0.000 1** < 0.000 1** < 0.000 1** 施肥方式 Fertilizer method (Fm) 0.386 0 0.311 3 0.147 7 0.259 5 施肥量 Fertilizer rate (Fr) 0.688 0 0.478 0 0.356 5 0.365 1 Y × Fm 0.905 7 0.152 1 0.032 6* 0.134 7 Y × Fr 0.723 6 0.177 0 0.290 4 0.201 0 Fm × Fr 0.113 2 0.223 0 0.055 3 0.052 9 Y × Fm × Fr 0.141 6 0.748 0 0.633 0 0.608 9

表 3 氮肥添加后生物量占比变化

Table 3 Changes in biomass proportion after nitrogen fertilizer addition %

科
Family 年份
Year 条施
Row application 撒施
Scattering application 豆科
Leguminosae 2019 3.63 1.86 2020 3.68 2.73 2021 7.37 5.03 禾本科
Gramineae 2019 76.41 78.81 2020 80.55 82.26 2021 84.12 84.22 杂类草
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