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a novel grass hybrid to reduce flood generation in temperate regions - white plastic sheeting

by:Cailong     2019-08-08
a novel grass hybrid to reduce flood generation in temperate regions  -  white plastic sheeting
We report the evaluation of a new breed of forage hybrid that provides efficient forage production and helps to mitigate flooding.
Spend more (Lolium perenne)
It is the first choice for most farmers, but lacks the ability to withstand extreme weather.
We put L.
Perenne is under intense pressure.
Grass-resistant, grassland tall grass and tall grass.
We prove L. perenne × F.
Compared to grass plants recommended by the UK's leading countries, grass plant varieties can reduce runoff by 51%
Perenne variety, increased by 43% compared to F
Field trials were conducted for two years.
We present evidence that the reduced runoff of this flower fest variety is due to strong initial root growth followed by rapid aging, especially in depth.
This type of hybrid grass shows the potential to reduce the possibility of flooding while providing food production under the conditions of climate change.
Three copies of the 10 × 3 YMM diagram of Cv AberStar (Lp)(diploid), cv Bf993 (Fp)(diploid)cv Prior (LpxFp)(tetraploid), Cv AberEpic (Lm)(diploid), cv Dovey (Fa)(hexaploid)
And x cv 99/1 (LmxFa)(tetraploid)
Built on a flat hillside (5°)
On clay-rich soil (
The typical ordinary tide begins to form soil (
USDA Classification
Or Dystric Gleysol (
FAO classification))
And then maintained three whole growing seasons (2006-2009)
At the North Witkey research center in Devon, England.
The Rowden research platform where these plots are located is located in the Hallsworth soil series.
This soil series represents the most common type of hydrological soil in England and Wales, covering about 13.
According to the hydrology of the soil type classification system, 9% of the land area.
Carefully select the study site to make the soil texture uniform to eliminate the possibility that the soil texture affects the soil moisture balance.
Drilling rainfall runoff plots in the same way using a professional small plot rig (Qualified seed drill)
Operated by experienced staff.
These plots follow their length (10u2005meter)with a buffer (2u2005meter)
The upper and lower boundaries ensure that the different grass species are not mixed.
At the beginning of each plot and buffer, add the correct number of seeds to the seeds that are drilled and planted.
The spacing of rows is 11. 5u2005cm.
The sowing speed is in line with commercial field tests across Europe: 2.
2 u2005 g m for two bodies (
Cv AberStar, AberEpic and cv Cv Bf993)and 3.
3 u2005 g is used as a number of ploids and hexaploids (
Resume before X cv 99/1 and cv Dovey).
The seeds of the double type grass are smaller, so a smaller seed mass is required to produce the same ground cover plant.
After six months of growth, a visual inspection was carried out to ensure that the plot was drilled with the correct grass material.
From June 2006 to the end of 2009, homogeneous sward was maintained through manual weeding.
These plots were fertilized at the beginning of the growing season, and after five forage cuts, dry matter production was determined by gravity (
April, then start on June, July and August, and then on September).
According to the guidelines at the time and soil tests at P and K, a total of about 250 mg/kg/ha of mineral nitrogen fertilizer was added, 90 mg/kg/ha P and 120 kg per year
The soil core was collected from the field community in the autumn of 2007, 2008, and the root mass was determined by gravity after washing.
During the same period (summer 2006)
, Established and maintained five equal-sized clones consisting of five representative genotypes of six varieties (min temp 8°C)
Greenhouse conditions in free drainage polyethylene
Lined with 1-meter-deep pipes filled with John Inness 03 potted compost (n = 4).
Ground growth was determined at the same time point in 2007 and 2008 as field experiments.
The plant is cut into 5 cm and dry matter is determined by gravity.
Root growth measurement is made by non-
In April and September 2007, the destructive score of visible roots in 10 cm slices observed by 1 m polyethylene sleeve extracted from IBERS's greenhouse pipeline, and 2008 simultaneous with leaf harvest
Record the maximum depth visible to the root and rate the root density of each 10 cm slice in the range of 0 (
No visible rootto 4 (
Extremely dense rooting).
The proportion of roots in white or very pale colors is classified as "New Roots ".
Other roots are classified as "old roots ".
The root system size is the sum of the scores of all these parts, and the root profile is the regression coefficient of the line from the lowest part to the surface through the root fitting.
In 2007, the dry matter yield and sward height of the plot were determined at five time points per year. 2009 (
In weeks 16, 23, 29, 33 and 38).
Sward height is measured by measuring 10 times every 1 metre along the length of each plot.
Determine forage yield by measuring the quality of 8 m strips per plot using Haldrop small plot harvesters.
Extract sub-samples from each plot and by drying (at 100°C)
Continuous quality.
The varieties of grass in the IBERS micro-View World are harvested in the same week.
Measure rainfall with two Delta tg1 rain gauges (
Standard meteorological equipment)
Within the plot
These plots are subjected to hydrological isolation from the horizontal flow of water through the top and bottom of the gravel drainage ditch and the plastic plates inserted at a depth of 40 cm (
10 cm above soil surface)
Along both sides of the plot
Regular visual checks are carried out to ensure that water does not flow into or out of the plot through the side surface barrier.
Runoff is collected along two hydrological paths: upstream capture water passes through the surface of the soil covered by vegetation at a depth of 5 cm (
By carefully inserting the plastic plate into the plot filled with the plastic template 10 cm);
On the clay Bg horizon there is a lower channel of 30 cuccm depth.
The Bg soil layer is Clay with low saturation permeability (
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