Effects of soil conditioner application on pH value of acidified soil and root characteristics of flue-cured tobacco

doi:10.3969/j.issn.1004-1524.2021.07.13

Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (7): 1275-1282.DOI: 10.3969/j.issn.1004-1524.2021.07.13

• Environmental Science • Previous Articles Next Articles

Effects of soil conditioner application on pH value of acidified soil and root characteristics of flue-cured tobacco

CHEN Gui¹(), ZHOU Jiewen², LI Haiping³, ZHANG Faming³, LI Chunshun⁴, LIU Li⁵, ZHANG Y²^,^*()

1. College of Resources & Environment, Hunan Agricultural University,Changsha 410128, China
2. College of Bioscience and Technology, Hunan Agricultural University, Changsha 410128, China
3. Baoshan City Branch of Yunnan Tobacco Company, Baoshan 678000, China
4. Jiangsu China Tobacco Industry Co., Ltd., Nanjing 210011, China
5. College of Agronomy, Hunan Agricultural University,Changsha 410128, China

Received:2020-12-02 Online:2021-07-25 Published:2021-08-06
Contact: ZHANG Y

Abstract

Abstract:

To clarify the dynamic variations of soil pH value and the effect on the root characteristics of flue-cured tobacco of soil conditioner application in acidified tobacco-planting soil, a pot experiment was conducted with soils of Changning County and Tengchong City, Baoshan City, Yunnan Province. The used soil conditioners consisted of lime, woody peat-based potassium humate (potassium humate for short)+hydrothermal mineral potassium fertilizer (mineral potassium fertilizer for short), potassium humate+calcium magnesium phosphate fertilizer. Also, potassium sulfate was used as one treatment besides the blank control (CK). The results showed that the soil pH value presented a trend of decreasing first and then gradually increasing after the addition of potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer within 60 d. Lime application increased soil pH in a short time, yet it tended to become more acid for the long run. The application of potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer significantly (P<0.05) increased the rhizosphere organic acid content, root activity, root ATPase activity and above-ground biomass of tobacco. In the soil of Tengchong City, compared with CK, root biomass was significantly (P<0.05) increased by 46.09% and 83.70%, respectively, after applying potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer.In general, the application of potassium humate+mineral potassium fertilizer and potassium humate+calcium magnesium phosphate fertilizer could slow down the acidification of the acidified tobacco-planting soil, which is also beneficial for the growth and development of tobacco plants.

Key words: acidified soil, soil conditioner, tobacco, root, potassium

CLC Number:

S156.6

CHEN Gui, ZHOU Jiewen, LI Haiping, ZHANG Faming, LI Chunshun, LIU Li, ZHANG Y. Effects of soil conditioner application on pH value of acidified soil and root characteristics of flue-cured tobacco[J]. Acta Agriculturae Zhejiangensis, 2021, 33(7): 1275-1282.

Figures/Tables 7

Table 1 Physio-chemical properties of test soils

地区Area	pH	OM/(g·kg^-1)	AP/(mg·kg^-1)	AHN/(mg·kg^-1)	EP/(mg·kg^-1)
腾冲市界头镇Jietou Town, Tengchong City	5.21	60.13	122.98	104.88	40.67
昌宁县鸡飞镇Jifei Town, Changning County	4.53	30.21	96.55	90.15	35.95

Table 2 Application amount of different chemical fertilizers under different treatments g

处理 Treatment	养分含量Nutrient content			肥料用量Fertilizer amount
处理 Treatment	N	P₂O₅	K₂O	C1	C2	C3	C4
CK	3.2	3.2	7.3	26.7	7.4	0.98	—
T1	3.2	3.2	7.3	26.7	7.4	0.98	—
T2	3.2	3.2	2.3	12.1	—	11.6	3.8
T3	3.2	3.2	6.75	26.7	5.6	2.87	—
T4	3.2	1.85	7.05	15.4	13.7	—	—

Fig.1 Effects of different treatments on soil pH

Fig.2 Effects of different treatments on rhizosphere organic acid content of tobacco Bars marked without the same letters indicated significant (P<0.05) difference within treatments on the same test soil. The same as below.

Fig.3 Effects of different treatments on root activity and ATPase activity of tobacco

Fig.4 Effects of different treatments on root biomass of tobacco

Fig.5 Effects of different treatments on above-ground biomass of tobacco

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Effects of soil conditioner application on pH value of acidified soil and root characteristics of flue-cured tobacco

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