Effects of Long-Term Application of Organic Fertilizer on Carbon and Nitrogen Accumulation and Distribution of Sweetpotato in Fluvo- Aquic Soil Area
ZHAO Peng,, LIU Ming, JIN Rong, CHEN XiaoGuang, ZHANG AiJun, TANG ZhongHou, WEI Meng,Xuzhou Institute of Agricultural Sciences of Xuhuai District of Jiangsu Province/Xuzhou Sweetpotato Research Center of Jiangsu Province/Key Laboratory of Sweetpotato Biology and Genetic Breeding, Ministry of Agriculture and Rural Affairs, Xuzhou 221131, Jiangsu
Abstract 【Objective】The accumulation and distribution of carbon and nitrogen in sweet potato is the key factor of yield formation, the response relationship between carbon and nitrogen accumulation and distribution in sweetpotato under long-term organic fertilizer addition was studied to provide scientific basis for high-yield and high-efficiency cultivation of sweetpotato in fluvo-aquic soil region. 【Method】Based on the 40-year long-term locating test of fluvo-aquic soil (Xuzhou), the treatments of no fertilizer (CK), nitrogen, phosphorus and potassium fertilizer (NPK), organic fertilizer (M), organic fertilizer + nitrogen, phosphorus and potassium fertilizer (MNPK) were selected as the research objects,soil properties, aboveground / underground biomass and carbon and nitrogen contents of main functional organs of sweet potato under different fertilization measures were measured and analyzed, the effects of different fertilization treatments on the content of carbon and nitrogen in sweet potato and the distribution ratio of carbon and nitrogen in various functional organs, as well as the changes of the ratio of carbon and nitrogen (C/N) in the aboveground and underground parts of sweet potato under different fertilization measures were expounded. The relationship between the distribution of carbon and nitrogen in sweet potato and soil properties was analyzed by principal component analysis.【Result】Compared with single application of organic fertilizer (M) or chemical fertilizer (NPK), long-term application of organic fertilizer combined with nitrogen, phosphorus and potassium fertilizer (MNPK) significantly increased the biomass and dry matter quality of sweet potato root tuber (P<0.05). At the same time, the contents of total nitrogen and available potassium in soil were significantly increased (P<0.01). The correlation analysis between soil properties and C/N fixation and C/N ratio of sweet potato showed that the C/N fixation of sweet potato organs was significantly positively correlated with soil organic carbon (SOC) and total nitrogen (TN) (P<0.01), and significantly positively correlated with soil available potassium (AK) (P<0.05). However, the content of soil available phosphorus (AP) was not correlated with the content of carbon and nitrogen in sweet potato leaves, but positively correlated with the nitrogen fixation of root tuber (P<0.01), with a correlation coefficient of 0.839. The C/N ratio of leaves of sweet potato was positively correlated with soil EC (P<0.01), and the C/N ratio of petioles and stems of sweet potato was negatively correlated with soil EC (P<0.01) . The C/N ratio of underground tubers of sweet potato was negatively correlated with soil available phosphorus (P<0.01); principal component analysis (PCA) was used to analyze the distribution ratio of carbon and nitrogen fixation in aboveground and underground parts and the C/N ratio of aboveground and underground parts. The results showed that the first two axes explained 66.6% of the variation, and the contribution rate of the first principal component axis was 42.8%. The order of CK and NPK treatments on axis 1 was higher, which indicated that the soil pH and EC values were higher under both treatments, and the explanations for the distribution of carbon and nitrogen in the aboveground part and C/N in the underground part of sweet potato were higher.【Conclusion】It can be seen that organic material addition can reasonably allocate C/N of each organ, improve the distribution ratio of carbon and nitrogen in the storage root part of sweetpotato, and promote the formation of sweetpotato yield. Keywords：long-term application of organic fertilizer;fluvo-aquic soil;sweetpotato;C/N;soil nutrients
PDF (861KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 赵鹏, 刘明, 靳容, 陈晓光, 张爱君, 唐忠厚, 魏猛. 长期施用有机肥对潮土区甘薯碳氮积累与分配的影响[J]. 中国农业科学, 2021, 54(10): 2142-2153 doi:10.3864/j.issn.0578-1752.2021.10.010 ZHAO Peng, LIU Ming, JIN Rong, CHEN XiaoGuang, ZHANG AiJun, TANG ZhongHou, WEI Meng. Effects of Long-Term Application of Organic Fertilizer on Carbon and Nitrogen Accumulation and Distribution of Sweetpotato in Fluvo- Aquic Soil Area[J]. Scientia Acricultura Sinica, 2021, 54(10): 2142-2153 doi:10.3864/j.issn.0578-1752.2021.10.010
并于甘薯收获后,采用多点混合法按照“S”形采集0—20 cm土层土样,自然风干后去除土壤表层枯叶、石砾及根系等,过1 mm 和0.25 mm 筛备用。土壤酸碱度（pH）和电导率（EC）采用pH 计（梅特勒 FE20,上海）和电导率仪（梅特勒 FE30,上海）测定;土壤有机碳（SOC）采用重铬酸钾氧化-外加热法测定;土壤全氮（TN）采用凯氏定氮法测定;土壤有效磷（AP）采用碳酸氢钠溶液浸提-钼锑抗比色法测定;速效钾（AK）采用醋酸铵浸提-火焰光度计法测定。
Table 2 表2 表2不同处理土壤性质 Table 2Soil properties relative to treatment
处理 Treatment
pH (1:5 water)
EC (μs·cm-1)
SOC (g·kg-1)
TN (g·kg-1)
AP (mg·kg-1)
AK (mg·kg-1)
CK
7.95±0.09 a
356.73±20.54 a
8.42±1.12 c
0.73±0.04 d
5.84±2.48 c
38.08±5.44 d
NPK
7.91±0.06 ab
130.78±7.16 b
13.06±2.2 b
1.22±0.12 c
12.87±1.74 c
92.11±2.28 b
M
7.94±0.04 a
77.32±14.16 c
17.63±1.49 a
1.48±0.09 b
173.84±22.6 a
65.08±9.96 c
MNPK
7.82±0.05 b
133.95±7.33 b
18.18±1.13 a
1.67±0.05 a
131.45±8.58 b
124.56±14.81 a
表中数据为平均值±标准差（n≥3）,同一列数据后不同字母表示差异达5%显著水平 The data in the table are mean±standard deviation (n≥3). The difference of different letters after the same column of data is 5% significant
Table 3 表3 表3不同处理甘薯各器官生物量及干物质量 Table 3Biomass and dry matter quality of organs in different treatments of sweetpotato
处理 Treatment
生物量 Biomass (t·hm-2)
干物质量 Dry matter (t·hm-2)
地上部 Aboveground
块根 Tuberous roots
地上部 Aboveground
块根 Tuberous roots
叶片 Leaf
叶柄 Petiole
藤蔓 Stem
叶片 Leaf
叶柄 Petiole
藤蔓 Stem
CK
2.86 b
1.49 c
1.38 c
11.44 c
0.61 b
0.15 c
0.27 b
4.03 c
NPK
7.37 a
5.28 b
5.23 b
30.8 b
1.62 a
0.43 b
1.05 a
9.96 b
M
5.99 a
5.99 ab
5.99 ab
38.33 b
1.13 a
0.53 ab
0.94 a
11.49 b
MNPK
7.81 a
8.36 a
7.26 a
49.22 a
1.41 a
0.65 a
1.04 a
15.51 a
表中数据为平均值（n≥3）,同一列数据后不同字母表示差异达5%显著水平 The data in the table is the average value (n≥3), and the difference of different letters after the same column of data is up to 5% significant level
柱上不同字母表示同一器官不同施肥处理间差异达5%显著水平。图2同 Fig. 1Carbon content of organs in different treatments of sweetpotato
Different letters on the column indicate that there is a significant difference of 5% among different fertilization treatments in the same organ. The same as Fig. 2
柱上不同字母表示同元素相同部位不同施肥处理间差异达5%显著水平 Fig. 3Carbon and nitrogen fixation in the upper and lower parts of sweetpotato under different treatments
Different letters on the column indicated that the difference between different fertilization treatments in the same part of the same element was 5% significant
柱上不同字母表示同一器官不同施肥处理间差异达5%显著水平。图5同 Fig. 4Distribution proportion of carbon in organs of sweetpotato
Different letters on the column indicated that there was a significant difference of 5% among different fertilization treatments in the same organ. The same as Fig.5
A/G-C:地上部碳固持量比例Carbon fixation ratio of the above ground;A/G-N:地上部氮固持量比例Nitrogen fixation ratio of the above ground;A/G-C/N:地上部碳氮比Carbon nitrogen ratio of the above ground;U/G-C地下部碳固持量比例Carbon fixation ratio of the underground;U/G-N:地下部氮固持量比例Nitrogen fixation ratio of the underground;U/G-C/N:地下部碳氮比Carbon nitrogen ratio of the underground Fig. 7Principal component analysis of soil properties and distribution ratio of carbon and nitrogen in sweetpotato
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,, 刘明, 靳容, 陈晓光, 张爱君, 唐忠厚, 魏猛
新窗口打开|下载原图ZIP|生成PPT
新窗口打开|下载原图ZIP|生成PPT
新窗口打开|下载原图ZIP|生成PPT
新窗口打开|下载原图ZIP|生成PPT
新窗口打开|下载原图ZIP|生成PPT
新窗口打开|下载原图ZIP|生成PPT
新窗口打开|下载原图ZIP|生成PPT
