plant nutrition 16 essential nutrients for normal plant growth
Post on 12-Jan-2016
Embed Size (px)
Plant Nutrition16 Essential Nutrients for Normal Plant Growth
3 ways to increase yields1. Select good genetic potential crop
2. Select the best management practices
3. Good environment conditions
Plant NutritionPlant nutrition the availability and types of basic chemical elements required by the plant to grow & reproduce
Plant Fertilizer the process of adding nutrients to the soil or leaves so these chemicals are added to growing environment.
98% obtained in soil-water solution
2% directly from soil
What if there is too much water?How do plants uptake nutrients?
Primary Nutrients in Agriculture Macronutrients are needed/used in large amounts
N,P,K C, H, O, Ca, Mg, S
If a plant receives to much nutrients What is it called Plant Toxicity
Primary NutrientsNitrogen (N) is needed for vegetative growth and dark green color. (easily leached out)
Nitrogen is the most important nutrient.Deficiency signs reduced growth & yellowing of lower leaves.
Yellowing is called Chlorosis
Primary Nutrients in Agriculture2. Phosphorus (P) important for seedling and young plant growth and develop good root system. (not easily leached out) AKA Potash Deficiency signs- reduced growth, poor root systems, reduced flowering. Also thin stems and browning or purpling of foliage.
Primary Nutrients in Agriculture3. Potassium (K) mined as a rock and made into a fertilizer can be leached. Deficiency signs reduced growth, shortened internodes and some burn, scorched marks (brown leaves).
Too Much (K ) can cause nitrogen deficiency.
Secondary Nutrients Calcium(Ca)Carbon(C)Hydrogen(H)Magnesium (Mg)Oxygen(O)Sulfur (S)Where does the plant get C,H,O?From the Air & Water
Micronutrients in AgricultureThey are used in small quantities and obtained from the soil. (excess amounts are toxic)Boron, (B)Chlorine (Cl)Copper (Cu)Iron (Fe)Manganese (Mn)Molybenum (Mo)Zinc (Zn)
16 Essential Nutrients for Normal Plant Growth
The absence of any one essential plant nutrient will cause the plant to grow poorly or show signs of poor health C Hopkns Cafe Mg (10)B, Cu, Cl, Mn. Mo, Zn (6)
Ways to apply NutrientsApplication Methods1. Premergence applied before germination 2. Top Dress done early in plants life3. Side Dress done later in plants life
Types of fertilizer 1. Organic > liquid or dry 2. Inorganic > liquid or dry
If there is to much fertilizer what could happen?Leaching Plants Burn
*The first two we can control, What do we mean best management practices? ( adding nutrients, crop rotation, no till or till, depth of seed, spacing of seed) Why would a person want to rotate there crops? control weeds, replenish nutrients into the soil.
*For plants to absorb the nutrients there must be some moisture in the soil
Wilting not enough water available for plants Field capacity - After the drainage has stopped, the large soil pores are filled with both air and water while the smaller pores are still full of water Saturation- During a rain shower or irrigation application, the soil pores will fill with water. If all soil pores are filled with water the soil is said to be saturated. The is no air left in the soil plants drown.Nitrogen is the most important nutrient Nitrogen moves through soil quickly (leaching ***Premergence (starter fertilizer ) germinating seeds for corn and soybeans are very sensitive to fertilizer burn.