Responses of soil aggregates, organic carbon, and crop yield to short-term intermittent deep tillage in Southern China

Hu, Ruiwen; Liu, Yongjun; Chen, Tao; Zheng, Zhongyi; Peng, Guangjue; Zou, Yidong; Chungui, Tang; Shan, Xuehua; QingMing, Zhou; Li, Juan

doi:10.1016/j.jclepro.2021.126767

Cited by 46 publications

(27 citation statements)

References 46 publications

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“…The multiple cropping system increases crop diversity, makes full use of limited soil resources, to a certain extent alleviates the shortage of cultivated land resources in agricultural production, and also guarantees food security (Yang et al, 2015 ; Xu et al, 2019b ). Tobacco-rice multiple cropping rotation, that is, planting tobacco in spring and rice in autumn on the same farmland, is one of the main double-cropping systems in southern China (Hu et al, 2021 ). It not only ensures crop security production but also improves the income of farmers and effectively alleviates the social problems of rural laborers moving to cities and no production activities in cultivated land due to insufficient income (Xu et al, 2019a ).…”

Section: Introductionmentioning

confidence: 99%

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Chen

Zheng

et al. 2021

Front. Plant Sci.

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The shortage of land resources restricts the sustainable development of agricultural production. Multiple cropping has been widely used in Southern China, but whether the continuous planting will cause a decline in soil quality and crop yield is unclear. To test whether multiple cropping could increase grain yield, we investigated the farmlands with different cultivation years (10–20 years, 20–40 years, and >40 years). Results showed that tobacco-rice multiple cropping rotation significantly increased soil pH, nitrogen nutrient content, and grain yield, and it increased the richness of the bacterial community. The farmland with 20–40 years of cultivation has the highest soil organic carbon (SOC), ammonium nitrogen, and grain yield, but there is no significant difference in the diversity and structure of the bacterial community in farmlands with different cultivation years. The molecular ecological network indicated that the stability of the bacterial community decreased across the cultivation years, which may result in a decline of farmland yields in multiple cropping system> 40 years. The Acidobacteria members as the keystone taxa (Zi ≥ 2.5 or Pi ≥ 0.62) appeared in the tobacco-rice multiple cropping rotation farmlands, and the highest abundance of Acidobacteria was found in the farmland with the highest SOC and ammonium nitrogen content, suggesting Acidobacteria Gp4, GP7, GP12, and GP17 are important taxa involved in the soil carbon and nitrogen cycle. Therefore, in this study, the multiple cropping systems for 20 years will not reduce the crop production potential, but they cannot last for more than 40 years. This study provides insights for ensuring soil quality and enhancing sustainable agricultural production capacity.

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Section: Introductionmentioning

confidence: 99%

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Chen

Zheng

et al. 2021

Front. Plant Sci.

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“…Long-time conventional rotary tillage in shallow layer have generated increasingly serious soil degradation problem to agriculture industry ( Hou et al, 2012 ), which increased soil bulk density in deep soil layer and decreased plant availability to soil fertility and water ( Hu et al, 2021 ). Intermittent deep vertical rotary tillage (IDT) was tried creatively to address this issue in Chinese agriculture ( Schneider et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Mechanism of Intermittent Deep Tillage and Different Depths Improving Crop Growth From the Perspective of Rhizosphere Soil Nutrients, Root System Architectures, Bacterial Communities, and Functional Profiles

Liu

Li³

et al. 2022

Front. Microbiol.

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Long-term conventional shallow tillage reduced soil quality and limited the agriculture development. Intermittent deep tillage could effectively promote agricultural production, through optimizing soil structure, underground ecology system, and soil fertility. However, the microecological mechanism of intermittent deep tillage promoting agriculture production has never been reported, and the effect of tillage depth on crop growth has not been explored in detail. In this study, three levels of intermittent deep tillage (30, 40, and 50 cm) treatments were conducted in an experimental field site with over 10 years of conventional shallow tillage (20 cm). Our results indicated that intermittent deep tillage practices helped to improve plant physiological growth status, chlorophyll a, and resistance to diseases, and the crop yield and value of output were increased with the deeper tillage practices. Crop yield (18.59%) and value of output (37.03%) were highest in IDT-50. There were three mechanisms of intermittent deep tillage practices that improved crop growth: (1) Intermittent deep tillage practices increased soil nutrients and root system architecture traits, which improved the fertility and nutrient uptake of crop through root system. (2) Changing rhizosphere environments, especially for root length, root tips, pH, and available potassium contributed to dissimilarity of bacterial communities and enriched plant growth-promoting species. (3) Functions associated with stress tolerance, including signal transduction and biosynthesis of other secondary metabolites were increased significantly in intermittent deep tillage treatments. Moreover, IDT-30 only increased soil characters and root system architecture traits compared with CK, but deeper tillage could also change rhizosphere bacterial communities and functional profiles. Plant height and stem girth in IDT-40 and IDT-50 were higher compared with IDT-30, and infection rates of black shank and black root rot in IDT-50 were even lower in IDT-40. The study provided a comprehensive explanation into the effects of intermittent deep tillage in plant production and suggested an optimal depth.

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“…Although under very low nutrient concentrations, the AMF pathway enabled plants to obtain nutrients by increasing the absorption surface area, when the nutrient utilization rate was high, the host would reduce their dependence on the nutrients obtained by AMF from the soil, and the pathway of direct root absorption was more effective. Subsoiling can increase the content of SOC (Feng et al 2020), increase the stability of soil aggregates (Hu et al 2021), and increase the content of AP and AK in the soil (Guo et al 2016), improve the chemical properties of the soil and improve the fertility of the soil. The results of soil nutrient testing in this study show that the contents of AP and AK in the 10~40cm soil layer are also significantly higher than those under conventional rotary tillage.…”

Section: Discussionmentioning

confidence: 99%

Deep tillage reduces the dependence of tobacco (Nicotiana tabacum L.) on arbuscular mycorrhizal fungi and promotes the growth of tobacco in dryland farming

Zheng

Liu³

et al. 2022

Can. J. Microbiol.

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The traditional shallow tillage method makes the soil quality declining, and affects the efficiency of agricultural production. Taking the conventional rotary tillage(12 cm) as the control, Yunyan 87 as the test variety, and the soil type of the test site is paddy soil, we studied the effects of deep tillage(Subsoiling 30 cm) on soil nutrients, arbuscular mycorrhizal fungi (AMF) and tobacco（Nicotiana tabacum L.）growth. The results showed that deep tillage increased the contents of organic carbon, available phosphorus(AP) and available potassium(AK) in 20 ~ 40 cm soil layer. The community of AMF was changed by deep tillage. Glomus, the dominant genus in both group, increased significantly in the soil after deep tillage. The colonization rate of AMF was lower than that of conventional rotary tillage. Deep tillage was beneficial to the growth of tobacco in the middle and late stages. Root growth and nutrient content of tobacco increased. Deep tillage significantly improved the output value of tobacco. It can be seen that deep tillage is conducive to improving soil fertility, promoting the vigorous growth of root, reducing the dependence of tobacco on AMF, and promoting the high quality and yield of tobacco in drylands of Hunan.

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Responses of soil aggregates, organic carbon, and crop yield to short-term intermittent deep tillage in Southern China

Cited by 46 publications

References 46 publications

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Soil Bacterial Community in the Multiple Cropping System Increased Grain Yield Within 40 Cultivation Years

Mechanism of Intermittent Deep Tillage and Different Depths Improving Crop Growth From the Perspective of Rhizosphere Soil Nutrients, Root System Architectures, Bacterial Communities, and Functional Profiles

Deep tillage reduces the dependence of tobacco (Nicotiana tabacum L.) on arbuscular mycorrhizal fungi and promotes the growth of tobacco in dryland farming

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