Absence of interactions between perennial bunchgrasses in a semi-arid temperate savanna: a 5-year field experiment

1997 ◽  
Vol 36 (4) ◽  
pp. 565-570 ◽  
Author(s):  
Guy R McPherson
Keyword(s):  
Field Experiment ◽  
Semi Arid

Accumulation of soil carbon under zero tillage cropping and perennial vegetation on the Liverpool Plains, eastern Australia

Soil Research ◽  
2009 ◽  
Vol 47 (3) ◽  
pp. 273 ◽  
Author(s):  
R. R. Young ◽  
B. Wilson ◽  
S. Harden ◽  
A. Bernardi
Keyword(s):  
Field Experiment ◽  
Soil Carbon ◽  
Cropping Systems ◽  
Annual Rainfall ◽  
Continuous Cropping ◽  
Zero Tillage ◽  
Accumulation Rates ◽  
Eastern Australia ◽  
Perennial Vegetation ◽  
Semi Arid

Australian agriculture contributes an estimated 16% of all national greenhouse gas emissions, and considerable attention is now focused on management approaches that reduce net emissions. One area of potential is the modification of cropping practices to increase soil carbon storage. Here, we report short–medium term changes in soil carbon under zero tillage cropping systems and perennial vegetation, both in a replicated field experiment and on nearby farmers’ paddocks, on carbon-depleted Black Vertosols in the upper Liverpool Plains catchment. Soil organic carbon stocks (CS) remained unchanged under both zero tillage long fallow wheat–sorghum rotations and zero tillage continuous winter cereal in a replicated field experiment from 1994 to 2000. There was some evidence of accumulation of CS under intensive (>1 crop/year) zero tillage response cropping. There was significant accumulation of CS (~0.35 Mg/ha.year) under 3 types of perennial pasture, despite removal of aerial biomass with each harvest. Significant accumulation was detected in the 0–0.1, 0.1–0.2, and 0.2–0.4 m depth increments under lucerne and the top 2 increments under mixed pastures of lucerne and phalaris and of C3 and C4 perennial grasses. Average annual rainfall for the period of observations was 772 mm, greater than the 40-year average of 680 mm. A comparison of major attributes of cropping systems and perennial pastures showed no association between aerial biomass production and accumulation rates of CS but a positive correlation between the residence times of established plants and accumulation rates of CS. CS also remained unchanged (1998/2000–07) under zero tillage cropping on nearby farms, irrespective of paddock history before 1998/2000 (zero tillage cropping, traditional cropping, or ~10 years of sown perennial pasture). These results are consistent with previous work in Queensland and central western New South Wales suggesting that the climate (warm, semi-arid temperate, semi-arid subtropical) of much of the inland cropping country in eastern Australia is not conducive to accumulation of soil carbon under continuous cropping, although they do suggest that CS may accumulate under several years of healthy perennial pastures in rotation with zero tillage cropping.

scholarly journals Root responses to elevated CO2 , warming and irrigation in a semi-arid grassland: Integrating biomass, length and life span in a 5-year field experiment

2018 ◽  
Vol 106 (6) ◽  
pp. 2176-2189 ◽  
Author(s):  
Kevin E. Mueller ◽  
Daniel R. LeCain ◽  
M. Luke McCormack ◽  
Elise Pendall ◽  
Mary Carlson ◽  
...  
Keyword(s):  
Field Experiment ◽  
Life Span ◽  
Elevated Co2 ◽  
Root Responses ◽  
Semi Arid

Low resilience at the early stages of recovery of the semi‐arid Chaco forest—Evidence from a field experiment

2021 ◽  
Author(s):  
M. Lucrecia Lipoma ◽  
Diego A. Cabrol ◽  
Aníbal Cuchietti ◽  
Lucas Enrico ◽  
Lucas D. Gorné ◽  
...  
Keyword(s):  
Field Experiment ◽  
Early Stages ◽  
Semi Arid ◽  
Arid Chaco

scholarly journals Wild Plants for the Phytostabilization of Phosphate Mine Waste in Semi-Arid Environments: A Field Experiment

Minerals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 42
Author(s):  
Hamza Zine ◽  
Sara Elgadi ◽  
Rachid Hakkou ◽  
Eleni G. Papazoglou ◽  
Laila Midhat ◽  
...  
Keyword(s):  
Trace Elements ◽  
Field Experiment ◽  
Plant Species ◽  
Mine Waste ◽  
Wild Plant ◽  
Arid Environments ◽  
Wild Plant Species ◽  
Phosphate Mine ◽  
Semi Arid

The management of mine waste has become an urgent issue, especially in semi-arid environments. In this context, and with an aim to inhibit the oxidation of the sulfide tailings of the abandoned mine of Kettara in Morocco, a store-and-release (SR) cover made of phosphate mine waste (PW) was implemented. In order to guarantee its long-term performance, phytostabilization by local wild plant species is currently the most effective and sustainable solution. This study aimed to assess the growth performance and phytostabilization efficiency of five local wild plant species to grow on the SR cover made of PW. A field experiment was conducted for two growing seasons (2018 and 2019), without amendments and with the minimum of human care. PW and the aboveground and belowground parts of the studied plant species were collected and analyzed for As, Cd, Cu, Ni, and Zn. The bioconcentration factor (BCF) and translocation factor (TF) were also calculated. Despite the hostile conditions of the mining environment, the five plant species showed promising growth performances as follows: Atriplex semibaccata > Vicia sativa > Launaea arborescens > Peganum harmala > Asparagus horridus. The five plants showed high accumulation capacity of the trace elements, with the highest concentrations in belowground tissue. Principal component analysis distinguished A. semibaccata as having a high concentration of Cu and As, while Asparagus horridus had higher concentrations of Cd and Zn. In contrast, P. harmala, V. sativa, and L. arborescens demonstrated affinity regarding Ni. According to the BCF (<1) and TF (<1), these plant species could be used as effective phytostabilizers of the studied trace elements. The present study showed that local wild plant species have a great potential for the phytostabilization of PW, and could ensure the long-term efficiency of SR cover.

scholarly journals Tef (Eragrostis tef) Responses to Phosphorus and Potassium Fertigation under Semi-Arid Mediterranean Climate

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1588
Author(s):  
Moshe Halpern ◽  
Kelem Gashu ◽  
Isaac Zipori ◽  
Yehoshua Saranga ◽  
Uri Yermiyahu
Keyword(s):  
Field Experiment ◽  
Grain Yield ◽  
Mediterranean Climate ◽  
The Other ◽  
Eragrostis Tef ◽  
Research Station ◽  
Cereal Crop ◽  
Phosphorus And Potassium ◽  
K Concentration ◽  
Semi Arid

Tef (Eragrostis tef (Zucc.) Trotter) is an annual small grain, panicle bearing, C4 cereal crop native to Ethiopia, where it is a major staple food. The objectives of the present study were to characterize the responses of two tef genotypes to escalating phosphorus (P) and potassium (K) levels and to determine an optimum range for P and K at which tef performance is maximized. Two experiments were carried out in the Gilat Research Station, each testing two different genotypes of tef (405B and 406W), one experiment in pots in controlled conditions, and the other in the field. In both experiments, the highest grain yield increased until 6 mg L−1 P, and declined at 12 mg L−1 P. The decline was precipitous and significant in the pot experiment, and gradual and statistically insignificant in the field experiment. In the pots experiment, the grain yield increased until 40 mg L−1 K, with no significant decrease thereafter. The effect of K concentration was only seen in the grain yield and not in the size of the other plant organs. In the field experiment, grain yield was highest at 80 mg L−1 K, but it was not statistically different from 40 mg L−1. The effect of K on growth was only apparent at maturity and not at flowering.

Effects of Mulches and Type of Seed Bed on Pearl Millet (Pennisetum Typhoides) under Semi-arid Conditions

1974 ◽  
Vol 10 (4) ◽  
pp. 263-272 ◽  
Author(s):  
Masood Ali ◽  
Rajendra Prasad
Keyword(s):  
Field Experiment ◽  
Nutrient Uptake ◽  
Pearl Millet ◽  
Crop Yield ◽  
Pennisetum Typhoides ◽  
Straw Mulch ◽  
Arid Conditions ◽  
Semi Arid ◽  
Better Than

SUMMARYA field experiment was conducted for two years to study the influence of type of seed bed and various mulcheson yield and nutrient uptake by pearl millet, and on moisture conservation, under the semi-arid conditions of Delhi. A flat seedbed stored more moisture, gave significantly higher yield of pearl millet, and increased the uptake of N, P and K, compared withridge and furrow beds. Mulches were effective in conserving moisture, with straw mulch significantly better than dust mulch inits effect on crop yield and nutrient uptake.

Sign in / Sign up

Export Citation Format

Share Document