Animal, Plant & Soil ScienceAnimal, Plant & Soil Science D3-1 Soil Nutrient Functions.
Plant and Soil Science
description
Transcript of Plant and Soil Science
![Page 1: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/1.jpg)
1
Plant and Soil Science
Introduction to Hydroponics
![Page 2: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/2.jpg)
2
What is hydroponics?
• The word hydroponics is derived from the Greek words “hydro” and “ponos”
• It is the science of growing plants in an inert medium
• Nutrients come from a nutrient solution
![Page 3: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/3.jpg)
3
Commercial use of hydroponics
•It has been used in the industry for over 45 years
![Page 4: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/4.jpg)
4
Crops• Almost any herbaceous plant
• lettuce, tomatoes, peppers, cucumbers, and herbs
• The crops that are grown are usually specially bred for hydroponics
![Page 5: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/5.jpg)
5
Advantages of hydroponics
• It can be used regardless of soil type
• Fresh produce can be grown all year round
• Crop yields are higher with hydroponics compared to conventional methods
• Higher quality product can be produced
• Soil borne insect and disease problems are greatly reduced
![Page 6: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/6.jpg)
6
Advantages of hydroponics
• Since there is no soil, there is no need to cultivate or weed the crops
• Less pesticides are used because the crops are so healthy
• All plants receive the correct nutrients at the right time
• Hydroponics allows for greater efficiency of water and fertilizers
![Page 7: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/7.jpg)
7
Disadvantages of hydroponics • High start up cost• Operators need to be skilled• The system must be sanitary
and kept clean because disease can affect all plants if it gets into the solution
![Page 8: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/8.jpg)
8
Hydroponic methods
• Water culture
• Aggregate culture
![Page 9: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/9.jpg)
9
Water culture
• Nutrient film technique (NFT)
• Aeroponics
![Page 10: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/10.jpg)
10
Nutrient Film Technique (NFT)• Plants are grown with their roots in a
trough that water runs through continuously
• Water level is very shallow to allow adequate air exchange
• Troughs can be up to 100 feet long and are sloped about two or three degrees to allow the water to flow
![Page 11: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/11.jpg)
11
NFTNutrient Film
Technique
![Page 12: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/12.jpg)
12
Aeroponics • The roots of the plant are
suspended in a chamber where the roots are misted constantly.
• The chamber creates an environment in which there is 100 percent humidity
![Page 13: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/13.jpg)
13
Aeroponics
![Page 14: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/14.jpg)
14
Aggregate culture
• Gravel culture
• Sand culture
• Sawdust culture
• Other cultures
–Common: rockwool culture
![Page 15: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/15.jpg)
15
Hydroponics
![Page 16: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/16.jpg)
16
Gravel culture • There are beds that are filled with
gravel
• Plants are placed in the gravel
• The plants are irrigated through sub-irrigation.
• The number of irritations depends on temperature and size of plants.
![Page 17: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/17.jpg)
17
Sand culture • There are beds that are filled with
sand • The beds can be on benches or on
the floor• Plants are placed in the sand• The plants are watered through
drip irrigation that brings water and nutrients
![Page 18: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/18.jpg)
18
Sand culture
![Page 19: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/19.jpg)
19
Sawdust culture• Similar to sand culture
• Sawdust from Douglas fir and western hemlock give the best growing results
• Medium sized particles are the best size to use
![Page 20: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/20.jpg)
20
Rockwool culture
• Rockwool is one of the most widely used mediums. Almost all the plants that are used in the other aggregate cultures were started in a rockwool cube
• Rockwool can be reused for three or four years
• Drip irrigation is usually used with it
![Page 21: Plant and Soil Science](https://reader035.fdocuments.us/reader035/viewer/2022062217/5681572f550346895dc4cc28/html5/thumbnails/21.jpg)
21
Rockwool