english report -wangsuhua
Post on 19-Jul-2015
175 Views
Preview:
TRANSCRIPT
The Effect of Different Concentration of N and P in Wheat
-------Wang Suhua
CONTENTS
The importance of wheat
The importance of N and P
N and P fertilizer
T he importance of wheat
in the world, wheat is planted widely, it is also a kind of main food crops in our country
the wheat’s area and production occupy about 25% of total food crops , Wheat is the second important crop, just after rice.
With the people's living standards improved and the pace of life accelerated, the demand of wheat, especially the high quality wheat shows a grow momentum.
The importance of N and P
Plants require a variety of
nutrients and nitrogen is
particularly important. From
the global perspective, in all
essential nutrients, nitrogen
is the primary factor to limit
the production and growth of
plant. It also significantly
improve the quality of plant.
Phosphorus is one of essential
nutrient elements, it is an
important component of many
organic compounds in plants,
and it participates in various
metabolisms with a variety of
ways. Phosphorus also plays
an important role on high crop
yield and maintains the good
characteristics of species.
N and P fertilizer
Ammonia’s volatilization and denitrification may cause
atmospheric pollution; Nitrogen fertilizer
may cause such
Environmental
pollution :
the leaching of nitrogen cause surface and underground
water pollution; nitrogen may cause nitrate enrichment.
phosphorus with surface runoff cause eutrophication of
surface water ;Phosphorus fertilizer
may cause such
environmental
pollution:
Phosphate fertilizer production process may cause
fluoride pollution.
CONTENTS
The species of wheat :Yangmai15 and Yangmai16
The concentration
Process
Measurement items
The concentration
N: the concentration of P is certain, which is 1 mmol/L , 3 treatments :
1 0.5 mmol/L
2 2mmol/L
3 15mmol/L
The concentration
P: the concentration of N is certain, which is 2 mmol/L , 3 treatments :
1 0.5 mmol/L
2 1mmol/L
3 3mmol/L
Process
1 disinfect the wheat seeds 2 sprouting : put seeds which have been disinfected in wet gauze, and leave them in electro-heating standing-temperature cultivator about 48 hours, the temperature is 25 .℃
3 Culture of seedling: put the containers which contain seedlings in light room 4-5 days, contain the time and strength of illumination.
4 divert seedlings to different treatments, cultivate about 6-7 days
5 get the plants and do experiments to get results of measurement items
Measurement items
Total content of N 、 P in overland part and underground part
1
The ratio of overland part and underground part’s fresh weight and dry weight
2
The characters of root system through root system scanner
3
The trans-membrane potential of roots4
Thank you!
top related