新疆农业科学 ›› 2024, Vol. 61 ›› Issue (12): 3097-3104.DOI: 10.6048/j.issn.1001-4330.2024.12.025
袁如薏(), 韩志立, 潘斯瑶, 马红钰, 黄铖, 赵丹, 程军回(
)
收稿日期:
2024-04-22
出版日期:
2024-12-20
发布日期:
2025-01-16
通信作者:
程军回(1983-),男,甘肃庄浪人,副教授,硕士生导师,研究方向为生态学,(E-mail)cjhgraymice@126.com作者简介:
袁如薏(1999-),女,新疆北屯人,硕士研究生,研究方向为植物营养学,(E-mail)1607270371@qq.com
基金资助:
YUAN Ruyi(), HAN Zhili, PAN Siyao, MA Hongyu, HUANG Cheng, ZHAO Dan, CHENG Junhui(
)
Received:
2024-04-22
Published:
2024-12-20
Online:
2025-01-16
Supported by:
摘要:
【目的】 验证灌木个体大小、空间位置和采样方向对其冠下土壤化学计量比的影响。【方法】 在准噶尔荒漠西北缘选取4种个体大小不同的里海盐爪爪个体,在其冠下4个不同采样方向(东、南、西、北)和4个空间位置上(主根周围、冠幅中央、冠幅边缘和株间空地),分别采集0~10 cm和10~20 cm土壤样品,在测定有机碳(SOC)、全氮(TN)、全磷(TP)含量的基础上,分析个体大小、空间位置和采样方向对土壤C/N、C/P和N/P变化的影响。【结果】 里海盐爪爪冠下土壤C/N、C/P和N/P表现出由主根周围向株间空地逐渐递减的趋势。其中,C/N在较小个体里海盐爪爪冠下10~20 cm土层表现出主根周围高出冠幅中央13.6%;C/P在0~10 cm和10~20 cm土层各空间位置间均存在显著性差异,且10~20 cm土层主根周围C/P高出株间空地15.6%-16.3%;N/P在10~20 cm土层中表现为大个体里海盐爪爪主根周围是冠幅边缘的1.3倍,较小个体里海盐爪爪冠幅中央显著高出主根周围40%。土壤SOC、TN、TP与土壤化学计量比表现出显著的相关性(P<0.01)。【结论】 该区域C/N较为稳定,C/P与N/P成为该区域养分限制性指标。
中图分类号:
袁如薏, 韩志立, 潘斯瑶, 马红钰, 黄铖, 赵丹, 程军回. 里海盐爪爪冠下土壤化学计量比变化特征[J]. 新疆农业科学, 2024, 61(12): 3097-3104.
YUAN Ruyi, HAN Zhili, PAN Siyao, MA Hongyu, HUANG Cheng, ZHAO Dan, CHENG Junhui. Variation characteristics of soil stoichiometric ratio under the canopy of Kalidium caspicum[J]. Xinjiang Agricultural Sciences, 2024, 61(12): 3097-3104.
里海盐爪爪个体大小 plant individual sizes of Kalidium caspicum | 冠幅面积 Capsicum crown area (m2) |
---|---|
大个体 Large individuals | 1.06~12.69 |
中等个体 Medium individuals | 0.63~1.05 |
小个体 Small individuals | 0.33~0.62 |
较小个体 Relatively small individuals | 0.05~0.32 |
表1 里海盐爪爪个体大小分类
Tab.1 Classification of individual size of Kalidium caspicum
里海盐爪爪个体大小 plant individual sizes of Kalidium caspicum | 冠幅面积 Capsicum crown area (m2) |
---|---|
大个体 Large individuals | 1.06~12.69 |
中等个体 Medium individuals | 0.63~1.05 |
小个体 Small individuals | 0.33~0.62 |
较小个体 Relatively small individuals | 0.05~0.32 |
图1 里海盐爪爪冠幅土壤碳氮比在0~10 cm和10~12 cm的变化特征(平均值±标准误)。 注:图中(a,b),(c,d),(e,f)和(g,h)分别代表里海盐爪爪的大个体、中等个体、小个体和较小个体
Fig.1 Variations of C/N under canopies of Kalidium caspicum at 0-10 cm and 10-20 cm (average value+standard error) Notes:(a,b),(c,d),(e,f) and (g,h) represented the large, medium, small and relatively small individuals of Kalidium caspicum respectively
土层 Soil layers | 指标 Indexes | log10 SOC | log10 TN | log10 TP | log10 (C/N) | log10 (C/P) |
---|---|---|---|---|---|---|
0~10 cm | log10 TN | 0.318** | ||||
log10 TP | -0.193** | -0.065 | ||||
log10 (C/N) | 0.322** | -0.795** | -0.061 | |||
log10 (C/P) | 0.955** | 0.303** | -0.473** | 0.309** | ||
log10 (N/P) | 0.346** | 0.979** | -0.266** | -0.756** | 0.389** | |
10~20 cm | log10 TN | 0.465** | ||||
log10 TP | -0.305** | -0.219** | ||||
log10 (C/N) | 0.404** | -0.621** | -0.045 | |||
log10 (C/P) | 0.973** | 0.474** | -0.514** | 0.373** | ||
log10 (N/P) | 0.496** | 0.978** | -0.415** | -0.571** | 0.549** |
表2 土壤化学计量比之间相关系数
Tab.2 Correlation coefficients among soil stoichiometric ratios
土层 Soil layers | 指标 Indexes | log10 SOC | log10 TN | log10 TP | log10 (C/N) | log10 (C/P) |
---|---|---|---|---|---|---|
0~10 cm | log10 TN | 0.318** | ||||
log10 TP | -0.193** | -0.065 | ||||
log10 (C/N) | 0.322** | -0.795** | -0.061 | |||
log10 (C/P) | 0.955** | 0.303** | -0.473** | 0.309** | ||
log10 (N/P) | 0.346** | 0.979** | -0.266** | -0.756** | 0.389** | |
10~20 cm | log10 TN | 0.465** | ||||
log10 TP | -0.305** | -0.219** | ||||
log10 (C/N) | 0.404** | -0.621** | -0.045 | |||
log10 (C/P) | 0.973** | 0.474** | -0.514** | 0.373** | ||
log10 (N/P) | 0.496** | 0.978** | -0.415** | -0.571** | 0.549** |
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