Photosynthetic Rate and Water Utilization of Rainfed Wheat with Plastic Mulching on the Semiarid Loess Plateau, China

Abstract Background:Agroforestry system is regarded as a promising practice in sustainable agricultural management. However, the effects of long-term tree-based intercropping on crop remain poorly understood, especially in the Loess Plateau (China). In this study, the impacts of photosynthetic and respiration rate were determined by the portable photosynthesis system (Li-6400), and the effects of the root growth dynamics of soybean in walnut-soybean intercropping system were measured by soil auger and WinRHIZO root analysis system, in the Loess Plateau. Results:The results showed that soybean reached the highest net photosynthetic rate during flowering period, with the net photosynthetic rate of intercropped soybean, which was 20.40µmol·m-2·s-1, significantly higher than that of its monocropped counterpart. Soybean biomass reached the maximum during the pod-bearing period, with intercropped soybean biomass being 25.49g, significantly higher than that of its monocropped counterpart. The mean diameter and increased density of soybean fine roots reduced along with increased soil depth. Both the diameter (0.43mm) and increased density (930cm/dm3) of intercropped soybean fine roots were evidently higher than those of monocropped soybean(0.35mm, 780cm/dm3). With increasing cropping years, fine roots of intercropped soybean tended to be mainly distributed in soil at a depth between 0 and 20cm from the fifth year. Conclusion:Collectively, compared with soybean monoculture, walnut soybean agroforestry system is more conducive to soybean growth in the Loess Plateau.

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Photosynthesis, biomass and fine root growth dynamics of soybean in walnut-soybean agroforestry system

10.21203/rs.2.16578/v3 ◽

2020 ◽

Author(s):

Bin Liu ◽

Pengxiang Gao ◽

Shuoxin Zhang

Keyword(s):

Root Growth ◽

Net Photosynthetic Rate ◽

Loess Plateau ◽

Photosynthetic Rate ◽

Fine Roots ◽

Soil Depth ◽

Growth Dynamics ◽

Agroforestry System ◽

The Loess Plateau ◽

Analysis System

Abstract Abstract Background: Agroforestry system is regarded as a promising practice in sustainable agricultural management. However, the effects of long-term tree-based intercropping on crop remain poorly understood, especially in the Loess Plateau. In this study, the impacts of photosynthetic and respiration rate were determined by the portable photosynthesis system (Li-6400), and the effects of the root growth dynamics of soybean in walnut-soybean intercropping system were measured by soil auger and WinRHIZO root analysis system, in the Loess Plateau. Results: The results showed that soybean reached the highest net photosynthetic rate during flowering period, with the net photosynthetic rate of intercropped soybean, which was 20.40µmol·m-2·s-1, significantly higher than that of its monocropped counterpart. Soybean biomass reached the maximum during the pod-bearing period, with intercropped soybean biomass being 25.49g, significantly higher than that of its monocropped counterpart. The mean diameter and increased density of soybean fine roots reduced along with increased soil depth. Both the diameter (0.43mm) and increased density (930cm/dm3) of intercropped soybean fine roots were evidently higher than those of monocropped soybean(0.35mm, 780cm/dm3). With increasing cropping years, fine roots of intercropped soybean tended to be mainly distributed in soil at a depth between 0 and 20cm from the fifth year. Conclusion: Collectively, compared with soybean monoculture, walnut soybean agroforestry system is more conducive to soybean growth in the Loess Plateau.

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Synergetic effects of plastic mulching and nitrogen application rates on grain yield, nitrogen uptake and translocation of maize planted in the Loess Plateau of China

Scientific Reports ◽

10.1038/s41598-018-32749-9 ◽

2018 ◽

Vol 8 (1) ◽

Cited By ~ 6

Author(s):

Xiukang Wang ◽

Ning Wang ◽

Yingying Xing ◽

Mohamed BEN El CAID

Keyword(s):

Grain Yield ◽

Loess Plateau ◽

Nitrogen Uptake ◽

Nitrogen Application ◽

The Loess Plateau ◽

Synergetic Effects ◽

Application Rates ◽

Plastic Mulching

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Increasing rainfed wheat yield by optimizing agronomic practices to consume more subsoil water in the loess plateau

The Crop Journal ◽

10.1016/j.cj.2021.01.006 ◽

2021 ◽

Author(s):

Wenjia Yang ◽

Weijian Liu ◽

Yulin Li ◽

Shiwen Wang ◽

Lina Yin ◽

...

Keyword(s):

Loess Plateau ◽

Wheat Yield ◽

The Loess Plateau ◽

Subsoil Water ◽

Agronomic Practices ◽

Rainfed Wheat

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Water Use Efficiency and Eco-Niche-Yield Prediction of Rainfed Wheat in China’s Loess Plateau

Journal of Agricultural Science ◽

10.5539/jas.v4n1p143 ◽

2011 ◽

Vol 4 (1) ◽

Author(s):

Qianying Pan ◽

Xinglai Pan ◽

Foyou Yang ◽

Xuefei Wen ◽

Fei Pei ◽

...

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Loess Plateau ◽

Yield Prediction ◽

Use Efficiency ◽

Rainfed Wheat

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Inoculation of arbuscular mycorrhizal fungi with plastic mulching in rainfed wheat: A promising farming strategy

Field Crops Research ◽

10.1016/j.fcr.2016.11.005 ◽

2017 ◽

Vol 204 ◽

pp. 229-241 ◽

Cited By ~ 6

Author(s):

Ying Zhu ◽

Guang-Chao Lv ◽

Ying-Long Chen ◽

Xiao-Fang Gong ◽

Yi-Nan Peng ◽

...

Keyword(s):

Arbuscular Mycorrhizal Fungi ◽

Mycorrhizal Fungi ◽

Arbuscular Mycorrhizal ◽

Plastic Mulching ◽

Rainfed Wheat

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Effect of Plastic Mulching on Soil Carbon and Nitrogen Cycling-Related Bacterial Community Structure and Function in a Dryland Spring Maize Field

Agriculture ◽

10.3390/agriculture11111040 ◽

2021 ◽

Vol 11 (11) ◽

pp. 1040

Author(s):

Sen Wang ◽

Liuyi Ding ◽

Wanyu Liu ◽

Jun Wang ◽

Yali Qian

Keyword(s):

Bacterial Community ◽

Nitrogen Cycling ◽

Loess Plateau ◽

Metabolic Pathways ◽

Soil Bacteria ◽

The Loess Plateau ◽

Carbon And Nitrogen ◽

Carbon And Nitrogen Cycling ◽

Spring Maize ◽

Plastic Mulching

Plastic mulching, given its positive effects on temperature and water retention, has been widely used to solve water shortages and nutrient scarcity in rainfed agricultural soils. This practice affects the physical and chemical processes of soil, including carbon and nitrogen cycling. However, research into microbe-mediated carbon and nitrogen cycling in soil with plastic mulching is still limited. In this study, the structures and functions of the soil bacterial community in non-mulched spring maize, plastic-mulched spring maize, and bareland fallow in a dryland field on the Loess Plateau in China were analyzed to explore the responses of microbe-mediated carbon and nitrogen cycling to plastic mulching. Results showed that the richness of soil bacteria was the highest in bareland fallow. Plastic mulching increased the diversity and richness of soil bacteria to a certain extent (p > 0.05), and significantly increased the content of microbial biomass nitrogen (MBN) (p < 0.05). Plastic mulching enhanced the total abundances of carbon and nitrogen cycling-related microbes, exhibiting a significant increase in the abundances of Cellvibrio, Bacillus, Methylobacterium and Nitrospira (p < 0.05). Predicted functional analysis revealed 299 metabolic pathways related to carbon and nitrogen cycling, including methane metabolism, carbon fixation in photosynthetic organisms, and nitrogen metabolism. The number of gene families assigned to carbon and nitrogen cycling-related metabolic pathways was higher in plastic mulched than that in non-mulched spring maize. This study demonstrated that plastic mulching enhances the capacity of carbon and nitrogen cycling, revealing its potential in mediating greenhouse gas emissions in the dryland spring maize fields on the Loess Plateau.

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The study on photosynthesis, biomass and fine root growth dynamics of soybean in walnut-soybean agroforestry system

10.21203/rs.2.16578/v1 ◽

2019 ◽

Author(s):

Bin Liu ◽

Pengxiang Gao ◽

Shuoxin Zhang

Keyword(s):

Root Growth ◽

Net Photosynthetic Rate ◽

Loess Plateau ◽

Photosynthetic Rate ◽

Fine Roots ◽

Soil Depth ◽

Growth Dynamics ◽

Agroforestry System ◽

The Loess Plateau ◽

The Mean

Abstract Soybean in the walnut-soybean agroforestry system in the Loess Plateau of China was focused in this research. The effects of walnut soybean intercropping on soybean growth in the Loess Plateau were determined by measuring the biomass, photosynthetic rate and root growth dynamics of soybean, so as to provide a basis for rational agroforestry models in the Loess Plateau. The results show that soybean reached the highest net photosynthetic rate during flowering period, with the net photosynthetic rate of intercropped soybean, which was 20.4000µmol·m-2·s-1, significantly higher than that of its monocropped counterpart. Soybean biomass reached the maximum during the pod-bearing period, with intercropped soybean biomass being 25.4879g, significantly higher than that of its monocropped counterpart. The mean diameter and increased density of soybean fine roots reduced along with increased soil depth. In particular, both the diameter (0.43mm) and increased density (930cm/dm3) of intercropped soybean fine roots were evidently higher than those of monocropped soybean(0.35mm, 780cm/dm3) , but the result was opposite in 40-60cm soil depth; with increasing cropping years, fine roots of intercropped soybean tended to be mainly distributed in soil at a depth between 0 and 20cm from the fifth year. Compared with soybean monoculture, walnut soybean agroforestry system is more conducive to soybean growth in the Loess Plateau.

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