Physiological characteristics and senescence of fine roots inRobinia pseudoacaciaplantations of different forest ages in the Loess Plateau

2016 ◽  
Vol 36 (14) ◽  
Author(s):  
苏瑾 SU Jin ◽  
王迪海 WANG Dihai
Keyword(s):  
Loess Plateau ◽  
Fine Roots ◽  
Physiological Characteristics ◽  
The Loess Plateau

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

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 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.

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

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.

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

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.

A model for vertical distribution of fine roots in Robinia pseudoacacia plantations on the Loess Plateau

2007 ◽  
Vol 2 (3) ◽  
pp. 291-297
Author(s):  
Xiangrong Cheng ◽  
Zhong Zhao ◽  
Mancai Guo ◽  
Dihai Wang ◽  
Zhifa Yuan
Keyword(s):  
Vertical Distribution ◽  
Loess Plateau ◽  
Fine Roots ◽  
Robinia Pseudoacacia ◽  
The Loess Plateau

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

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 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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