Small rainfall pulses affected leaf photosynthesis rather than biomass production of dominant species in semiarid grassland community on Loess Plateau of China

2017 ◽  
Vol 44 (12) ◽  
pp. 1229 ◽  
Author(s):  
Peifeng Xiong ◽  
Jiali Shu ◽  
He Zhang ◽  
Zhao Jia ◽  
Jinxi Song ◽  
...  
Keyword(s):  
Soil Water ◽  
Loess Plateau ◽  
Biomass Production ◽  
Dominant Species ◽  
Intercellular Co2 Concentration ◽  
Semiarid Region ◽  
Leaf Photosynthesis ◽  
Community Characteristics ◽  
Rainfall Events ◽  
Grassland Community

In the semiarid region Loess Plateau of China, rainfall events, typically characterised as pulses, affect photosynthesis and plant community characteristics. The response of dominant species and grassland community to rainfall pulses was evaluated through a simulation experiment with five pulse sizes (0, 5, 10, 20 and 30 mm) in the semiarid Loess Plateau of China in June and August of 2013. The study was conducted in a natural grassland community dominated by Bothrichloa ischaemum (L.)Keng and Lespedeza davurica (Lax.) Schindl. In June, the leaf photosynthetic rate (Pn), transpiration rate, stomatal conductance, intercellular CO2 concentration of both species and soil water content increased rapidly after rainfall pulses. B. ischaemum was more sensitive to the pulses and responded significantly to 5 mm rainfall, whereas L. davurica responded significantly only to rainfall events greater than 5 mm. The magnitude and duration of the photosynthetic responses of the two species to rainfall pulse gradually increased with rainfall sizes. The maximum Pn of B. ischaemum appeared on the third day under 30 mm rainfall, whereas for L. davurica it appeared on the second day under 20 mm rainfall. Soil water storage (0–50 cm) was significantly affected under 10, 20 and 30 mm rainfall. Only large pulses (20, 30 mm) increased community biomass production by 21.3 and 27.6% respectively. In August, the effect of rainfall on the maximum Pn and community characteristics was generally not significant. Rainfall pulses affected leaf photosynthesis because of a complex interplay between rainfall size, species and season, but might not induce a positive community-level feedback under changing rainfall patterns.

scholarly journals Aboveground biomass production and soil water dynamics of four leguminous forages in semiarid region, northwest China

2006 ◽  
Vol 72 (4) ◽  
pp. 507-516 ◽  
Author(s):  
B.C. Xu ◽  
P. Gichuki ◽  
L. Shan ◽  
F.M. Li
Keyword(s):  
Soil Water ◽  
Biomass Production ◽  
Aboveground Biomass ◽  
Northwest China ◽  
Water Dynamics ◽  
Semiarid Region ◽  
Soil Water Dynamics

scholarly journals Eco-Physiological Responses of Dominant Species to Watering in a Natural Grassland Community on the Semi-Arid Loess Plateau of China

2016 ◽  
Vol 7 ◽  
Author(s):  
Furong Niu ◽  
Dongping Duan ◽  
Ji Chen ◽  
Peifeng Xiong ◽  
He Zhang ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Dominant Species ◽  
Physiological Responses ◽  
Grassland Community ◽  
Natural Grassland ◽  
Semi Arid

Response of grassland community functional traits to soil water in a typical the Loess Plateau watershed

2020 ◽  
Vol 40 (8) ◽  
Author(s):  
王鑫，杨磊，赵倩，张钦弟 WANG Xin
Keyword(s):  
Soil Water ◽  
Loess Plateau ◽  
Functional Traits ◽  
The Loess Plateau ◽  
Grassland Community

scholarly journals Soil Water Availability Changes in Amount and Timing Favor the Growth and Competitiveness of Grass Than a Co-dominant Legume in Their Mixtures

2021 ◽  
Vol 12 ◽  
Author(s):  
Weizhou Xu ◽  
Xiping Deng ◽  
Bingcheng Xu ◽  
Jairo A. Palta ◽  
Yinglong Chen
Keyword(s):  
Soil Water ◽  
Biomass Production ◽  
Water Availability ◽  
Dominant Species ◽  
Soil Water Availability ◽  
Bothriochloa Ischaemum ◽  
Extreme Precipitation Events ◽  
Flowering Periods ◽  
Water Contents ◽  
Soil Water Contents

The grasslands on the semi-arid Loess Plateau of China are expected to be particularly responsive to the size and frequency changes of extreme precipitation events because their ecological processes are largely driven by distinct soil moisture pulses. However, the plant growth and competitiveness of co-dominant species in response to the changes in the amount and timing of soil water are still unclear. Thus, two co-dominant species, Bothriochloa ischaemum and Lespedeza davurica, were grown in seven mixture ratios under three watering regimes [80 ± 5% pot soil capacity (FC) (high watering), 60 ± 5% FC (moderate watering), and 40 ± 5% FC (low watering)] in a pot experiment. The soil water contents were rapidly improved from low to moderate water and from moderate to high water, respectively, at the heading, flowering, and maturity stages of B. ischaemum, and were maintained until the end of the growing season of each species. The biomass production of both species increased significantly with the increased soil water contents, particularly at the heading and flowering periods, with a more pronounced increase in B. ischaemum in the mixtures. The root/shoot ratio of both species was decreased when the soil water availability increased at the heading or flowering periods. The total biomass production, water use efficiency (WUE), and relative yield total (RYT) increased gradually with the increase of B. ischaemum in the mixtures. The relative competition intensity was below zero in B. ischaemum, and above zero in L. davurica. The competitive balance index calculated for B. ischaemum was increased with the increase of the soil water contents. Bothriochloa ischaemum responded more positively to the periodical increase in soil water availability than L. davurica, indicating that the abundance of B. ischaemum could increase in relatively wet seasons or plenty-rainfall periods. In addition, the mixture ratio of 10:2 (B. ischaemum to L. davurica) was the most compatible combination for the improved biomass production, WUE, and RYTs across all soil water treatments.

scholarly journals Soil Water Movement Changes Associated with Revegetation on the Loess Plateau of China

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 731 ◽  
Author(s):  
Haocheng Ke ◽  
Peng Li ◽  
Zhanbin Li ◽  
Peng Shi ◽  
Jingming Hou
Keyword(s):  
Soil Water ◽  
Loess Plateau ◽  
Large Scale ◽  
Plant Density ◽  
Water Movement ◽  
Temporal Distribution ◽  
Semiarid Region ◽  
The Loess Plateau ◽  
Vegetation Growth ◽  
Soil Water Movement

Soil water is the limitation factors in the semiarid region for vegetation growth. With the large scale “Grain for Green” implementation on the Loess Plateau of China, an amount of sloping cropland was converted to forestland, shrubland, and grassland. The spatial and temporal distribution of soil water was changed. However, the effect of revegetation on soil water movement is still unclear. In this study, we analyze the stable isotopes changes in precipitation and soil water in sloping cropland, forestland, shrubland, and grassland to trace the movement of moisture in soil. The results showed that δ18O in shallow layers (<20 cm depth) of sloping cropland, forestland, shrubland, and grassland were −3.54‰, −2.68‰, −4.00‰, and −3.16‰, respectively. The δ18O in these layers were higher than that in the lower layers, indicating that evaporation was mainly from the shallow layers. The δ18O for the soil water in the unsaturated zone in the grassland, shrubland, and forestland of the temporal variability decreases with depth and approaches a minimum value at 160 cm, 180 cm, and 200 cm, respectively, suggesting that the soil water is relatively stable many months or even longer. Precipitation was infiltrated with piston and preferential modes, and infiltration demonstrated obvious mixing. Present study demonstrated the δ18O was more sensitive than the soil water content for tracing the maximum infiltration depth of event water and recharge mechanisms. Consequently, we suggested that the land user management such as type, plant density should be considered in the revegetation.

Aboveground biomass production and dominant species type determined canopy storage capacity of abandoned grassland communities on semiarid Loess Plateau

Ecohydrology ◽  
2020 ◽  
Author(s):  
Peifeng Xiong ◽  
Zhifei Chen ◽  
Junjie Zhou ◽  
Shuaibin Lai ◽  
Chunxia Jian ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Biomass Production ◽  
Aboveground Biomass ◽  
Dominant Species ◽  
Storage Capacity ◽  
Species Type ◽  
Grassland Communities ◽  
Abandoned Grassland

Different biomass production and soil water patterns between natural and artificial vegetation along an environmental gradient on the Loess Plateau

2022 ◽  
pp. 152839
Author(s):  
Yuting Yang ◽  
Yongming Fan ◽  
Can Mujue Basang ◽  
Jinxin Lu ◽  
Cheng Zheng ◽  
...  
Keyword(s):  
Soil Water ◽  
Loess Plateau ◽  
Biomass Production ◽  
Environmental Gradient ◽  
The Loess Plateau ◽  
Artificial Vegetation

Effects of Lucerne Removal Time on Soil Water and Productivity in a Lucerne- Wheat Rotation on the Western Loess Plateau

2011 ◽  
Vol 37 (4) ◽  
pp. 686-693 ◽  
Author(s):  
Ling-Ling LI ◽  
Gao-Bao HUANG ◽  
Ren-Zhi ZHANG ◽  
Li-Qun CAI ◽  
Zhu-Zhu LUO ◽  
...  
Keyword(s):  
Soil Water ◽  
Loess Plateau ◽  
Removal Time ◽  
Western Loess Plateau

scholarly journals Community characteristics and distribution patterns of soil fauna after vegetation restoration in the northern Loess Plateau

2021 ◽  
Vol 122 ◽  
pp. 107236
Author(s):  
Xi Yang ◽  
Ming'an Shao ◽  
Tongchuan Li ◽  
Miao Gan ◽  
Mingyu Chen
Keyword(s):  
Loess Plateau ◽  
Soil Fauna ◽  
Distribution Patterns ◽  
Vegetation Restoration ◽  
Community Characteristics
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