Effect of Nitrogen Application on Chemical Properties of Sugar Beet Rhizosphere Soil and Correlation Analysis

doi:10.11924/j.issn.1000-6850.casb2023-0869

Abstract

Abstract:

The application of nitrogen fertilizer directly affects soil fertility and physical and chemical properties. Excessive application of nitrogen will lead to low nitrogen use efficiency and pollution. In this study, the main chemical properties of beet rhizosphere soil and their correlation were studied to provide reference for scientific cultivation and rational nitrogen application in agricultural production. A field experiment was conducted with a sugar beet variety ‘H004’ with high nitrogen efficiency and ‘HI0466’ with low nitrogen efficiency. Two treatments, N0 (N: 0 kg/hm²) and N120 (N: 120 kg/hm²), were used to study the changes of soil pH, organic matter, available phosphorus, available potash, alkali-hydrolyzable nitrogen and other major chemical properties in the rhizosphere of sugar beet at different developmental stages. The results showed that the contents of pH, organic matter and alkali-hydrolyzable nitrogen in rhizosphere soil of ‘H004’ under nitrogen application were 2.64%, 2.49%, 0.42%, respectively, and the contents of available phosphorus and available potassium were 12.10%, 17.22%, respectively; the content of organic matter, available phosphorus and potassium in rhizosphere soil of ‘HI0466’ was 5.99%, 5.60%, 47.63%, respectively, and the content of pH and alkali-hydrolyzable nitrogen were 0.14% and 3.68%, respectively. Pearson correlation results showed that there was a significant negative correlation between pH and organic matter content in rhizosphere soil of the two cultivars under no nitrogen application; there was also a significant negative correlation between available potassium and alkali-hydrolyzable nitrogen content under the condition of nitrogen application, the content of available phosphorus and organic matter in rhizosphere soil of nitrogen-efficient varieties was significantly negatively correlated, while that of available potassium was significantly positively correlated; there was a significant positive correlation between organic matter and alkali-hydrolyzable nitrogen content in rhizosphere soil of nitrogen inefficient varieties. Nitrogen application had different effects on nutrient content in rhizosphere soil of beet varieties with different nitrogen efficiency, and the high nitrogen efficiency varieties were more suitable for non-nitrogen application than low nitrogen efficiency varieties.

Key words: beets, rhizosphere soil, soil chemical properties, nitrogen fertilizer, correlation analysis

WANG Wang, YU Ze, CUI Jingjing, SONG Baiquan, WANG Qiuhong. Effect of Nitrogen Application on Chemical Properties of Sugar Beet Rhizosphere Soil and Correlation Analysis[J]. Chinese Agricultural Science Bulletin, 2024, 40(22): 88-93.

Figures/Tables 4

References 34

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指标	H0040，N0		H004，N120			HI0466，N0		HI0466，N120
指标	主成分1	主成分2	主成分1	主成分2	主成分3	主成分1	主成分2	主成分1	主成分2
pH	0.58	-0.73	-0.14	0.35	0.91	0.21	-0.97	0.73	0.49
有机质	-0.42	0.86	-0.75	0.57	-0.29	-0.70	0.67	0.90	-0.36
速效磷	0.36	0.72	0.96	0.13	0.15	0.67	0.47	0.55	0.20
速效钾	0.84	0.36	0.81	0.38	-0.29	0.86	0.32	0.39	0.74
碱解氮	-0.91	-0.24	-0.05	-0.97	0.07	-0.92	-0.09	0.57	-0.75
特征值	2.18	1.98	2.18	1.55	1.03	2.55	1.71	2.12	1.52
贡献率/%	43.59	39.55	43.57	30.96	20.62	51.06	34.26	42.41	30.42
累计贡献率/%	43.59	83.14	43.57	74.53	95.14	51.06	85.31	42.41	72.82

指标	H0040，N0		H004，N120			HI0466，N0		HI0466，N120
指标	主成分1	主成分2	主成分1	主成分2	主成分3	主成分1	主成分2	主成分1	主成分2
pH	0.58	-0.73	-0.14	0.35	0.91	0.21	-0.97	0.73	0.49
有机质	-0.42	0.86	-0.75	0.57	-0.29	-0.70	0.67	0.90	-0.36
速效磷	0.36	0.72	0.96	0.13	0.15	0.67	0.47	0.55	0.20
速效钾	0.84	0.36	0.81	0.38	-0.29	0.86	0.32	0.39	0.74
碱解氮	-0.91	-0.24	-0.05	-0.97	0.07	-0.92	-0.09	0.57	-0.75
特征值	2.18	1.98	2.18	1.55	1.03	2.55	1.71	2.12	1.52
贡献率/%	43.59	39.55	43.57	30.96	20.62	51.06	34.26	42.41	30.42
累计贡献率/%	43.59	83.14	43.57	74.53	95.14	51.06	85.31	42.41	72.82