Effects of Phosphorus-based Soil Conditioner on Growth of Chinese Cabbage in Low-phosphorus Red Soil

doi:10.11924/j.issn.1000-6850.casb2021-0441

Abstract

Abstract:

A pot experiment was conducted to study the effects of different amounts of soil conditioner on the improvement of low phosphorus red soil and the growth of Chinese cabbage. The results indicated that soil conditioner increased the number of soil aggregates, pH, total phosphorus, organic matter and cation exchange capacity, and the effects of 200% and 100% soil conditioner were the best, which were significantly higher than that of chemical fertilizer and phosphorus deficiency treatment. The dry weight of the aboveground and underground parts of Chinese cabbage treated with 200% soil conditioner was 83.3% and 81.3% of that of chemical fertilizer treatment, respectively, 4.48 times and 2.8 times of that of phosphorus deficiency treatment. Water-soluble sugar and reducing sugar content increased by 77.92% and 57.94% under 50% soil conditioner treatment compared with those under phosphorus deficiency treatment. The highest phosphorus content of the aboveground part of Chinese cabbage was 0.4% under 50% soil conditioner treatment, 42.86% higher than that of phosphorus deficiency treatment, and the phosphorus utilization rate was 26.7%. The results indicated that the phosphorus-based soil conditioner could partially replace phosphorus fertilizer, and the higher the amount of soil conditioner application, the better the improvement effect on low-phosphorus red soil.

Key words: soil conditioner, low-phosphorus red soil, Chinese cabbage, physicochemical properties of soil

CLC Number:

S634.3

ZENG Jie, YU Lang, DABU Xilatu, LI Yunju. Effects of Phosphorus-based Soil Conditioner on Growth of Chinese Cabbage in Low-phosphorus Red Soil[J]. Chinese Agricultural Science Bulletin, 2022, 38(9): 81-87.

Figures/Tables 8

References 27

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供试材料	P₂O₅/%	N/%	K₂O/%	pH	有机质/(g/kg)	As/(mg/kg)	Cd/(mg/kg)	Cr/(mg/kg)	Pb/(mg/kg)
尿素	—	46.4	—	—	—	—	—	—	—
过磷酸钙	14.0	—	—	—	—	—	—	—	—
K₂SO₄	—	—	51.0	—	—	—	—	—	—
土壤调理剂	6.27	1.14	0.45	7.92	400.62	11.21	1.24	66.05	17.34
磷矿泥	22.2	—	—	7.62	—	5.0	2.00	15.00	76.00

供试材料	P₂O₅/%	N/%	K₂O/%	pH	有机质/(g/kg)	As/(mg/kg)	Cd/(mg/kg)	Cr/(mg/kg)	Pb/(mg/kg)
尿素	—	46.4	—	—	—	—	—	—	—
过磷酸钙	14.0	—	—	—	—	—	—	—	—
K₂SO₄	—	—	51.0	—	—	—	—	—	—
土壤调理剂	6.27	1.14	0.45	7.92	400.62	11.21	1.24	66.05	17.34
磷矿泥	22.2	—	—	7.62	—	5.0	2.00	15.00	76.00

处理		尿素	过磷酸钙	K₂SO₄	土壤调理剂	磷矿泥
NP0K	尿素+硫酸钾	0.431	0	0.355	0
NPK	尿素+过磷酸钙+硫酸钾	0.431	5	0.355	0
1/2LKN	尿素+1/2土壤调理剂+硫酸钾	0.161	0	0.258	5.5
1LKN	尿素+1土壤调理剂+硫酸钾	0.161	0	0.258	11
2LKN	尿素+2土壤调理剂+硫酸钾	0.161	0	0.258	22
LWK	尿素+磷矿泥+硫酸钾	0.431	0	0.355	0	3.093

处理		尿素	过磷酸钙	K₂SO₄	土壤调理剂	磷矿泥
NP0K	尿素+硫酸钾	0.431	0	0.355	0
NPK	尿素+过磷酸钙+硫酸钾	0.431	5	0.355	0
1/2LKN	尿素+1/2土壤调理剂+硫酸钾	0.161	0	0.258	5.5
1LKN	尿素+1土壤调理剂+硫酸钾	0.161	0	0.258	11
2LKN	尿素+2土壤调理剂+硫酸钾	0.161	0	0.258	22
LWK	尿素+磷矿泥+硫酸钾	0.431	0	0.355	0	3.093

处理	>5.0 mm	5.0~2.0 mm	2.0~1.0 mm	1.0~0.5 mm	0.5~0.25 mm	<0.25 mm
LWK	0.033a	2.20bc	6.4a	21.09ab	3.498b	66.77b
NPK	0a	1.84c	3.72b	17.49bc	7.56a	69.39ab
2LKN	0.021a	2.51ab	6.756a	19.4abc	5.49ab	65.55bc
1LKN	0a	2.61a	6.42a	22.55a	7.73a	60.69c
1/2 LKN	0a	1.86c	6.07a	20.02abc	6.645ab	65.4bc
NP0K	0a	1.095d	3.92b	15.92c	6.136ab	72.93a