Application and Effect Analysis of Natural Humus Materials Soil Amendments in Improvement of Newly Cultivated Land

doi:10.11924/j.issn.1000-6850.casb2024-0325

Abstract

Abstract:

Reclaiming arable land is an important way to achieve the principle of “cultivated land dynamic balance system” in land consolidation projects of China. However, due to the lack of fertile farming layers, agricultural productivity is greatly limited. Natural humus materials have the potential to rapidly improve soil organic matter, so it is of practical significance to study the improvement effect of the natural humus materials in the newly cultivated land. In this study, 5.81 hm² of newly cultivated land in Tongyu County of Jilin Province was selected as the study area. Cultivation layer soil improvement was achieved by adding natural humus materials (30 t/hm²), excipients I (13.5 t/hm²), excipients II (1.5 t/hm²) to the 0-20 cm cultivated layer at one time. The properties of soil organic matter, nitrogen, phosphorus and potassium contents before and after the improvement were investigated by sampling in the study area. The results showed that the soil amendments of natural humus material could rapidly increase soil organic matter contents (average increase of 5.17 g/kg) and decrease soil conductivity values (average decrease of 89.51 μS/cm), and also had a certain enhancing effect on soil nitrogen and potassium contents. But soil phosphorus contents showed a decreasing trend after the implementation of improvement practices. Soil amendments based on natural humus materials could rapidly increase soil carbon and nitrogen contents in a short period of time and alleviate soil saline-alkali barrier. However, the problem of imbalanced nitrogen, phosphorus, and potassium contents in soil has not been resolved, and measures such as formula fertilization are still needed to regulate soil nutrient content.

Key words: soil amendments, organic matter, reclaimed farmland, ploughing layer, natural humus material

LI Jianpeng, ZHANG Congzhi, PAN Hui, MA Xuewei, ZHAO Zhanhui. Application and Effect Analysis of Natural Humus Materials Soil Amendments in Improvement of Newly Cultivated Land[J]. Chinese Agricultural Science Bulletin, 2025, 41(2): 63-68.

Figures/Tables 6

References 25

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指标	本底				改良后
指标	平均值	最小值	最大值	方差	平均值	最小值	最大值	方差
有机质/(g/kg)	7.96	4.47	11.57	0.37	13.13	8.92	17.97	0.48
易氧化碳/(g/kg)	1.77	0.53	4.66	0.18	3.83	2.43	6.48	0.23
全氮/(g/kg)	0.75	0.38	1.13	0.04	0.81	0.51	1.36	0.04
全磷/(g/kg)	0.35	0.21	0.72	0.02	0.32	0.20	0.55	0.02
全钾/(g/kg)	25.89	23.52	28.00	0.22	25.52	22.35	28.08	0.27
碱解氮/(mg/kg)	53.03	28.56	83.47	2.82	63.19	42.32	95.78	2.60
有效磷/(mg/kg)	31.56	5.38	69.86	3.82	25.47	6.32	65.36	2.95
速效钾/(mg/kg)	349.58	108.00	872.00	28.35	415.73	182.00	861.00	33.68
pH	8.87	8.52	9.53	0.04	8.88	8.03	9.52	0.06
电导率/(μS/cm)	223.92	143.70	431.70	16.80	134.41	85.30	242.00	7.06

指标	本底				改良后
指标	平均值	最小值	最大值	方差	平均值	最小值	最大值	方差
有机质/(g/kg)	7.96	4.47	11.57	0.37	13.13	8.92	17.97	0.48
易氧化碳/(g/kg)	1.77	0.53	4.66	0.18	3.83	2.43	6.48	0.23
全氮/(g/kg)	0.75	0.38	1.13	0.04	0.81	0.51	1.36	0.04
全磷/(g/kg)	0.35	0.21	0.72	0.02	0.32	0.20	0.55	0.02
全钾/(g/kg)	25.89	23.52	28.00	0.22	25.52	22.35	28.08	0.27
碱解氮/(mg/kg)	53.03	28.56	83.47	2.82	63.19	42.32	95.78	2.60
有效磷/(mg/kg)	31.56	5.38	69.86	3.82	25.47	6.32	65.36	2.95
速效钾/(mg/kg)	349.58	108.00	872.00	28.35	415.73	182.00	861.00	33.68
pH	8.87	8.52	9.53	0.04	8.88	8.03	9.52	0.06
电导率/(μS/cm)	223.92	143.70	431.70	16.80	134.41	85.30	242.00	7.06