![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
**Overfertilization Can Lead to Physiological Diseases in Vegetables**
*Date: July 31, 2006 | Total Views: 6 | Author: Xinjishu | Source: Xinjiang Agricultural Information*
Vegetables are among the most economically valuable crops, and farmers often apply excessive amounts of both organic and chemical fertilizers in an effort to boost yields. However, this overuse can lead to an accumulation of nutrients in the soil, which in turn causes physiological problems in plants—especially in greenhouse settings. These issues not only reduce crop quality but also threaten long-term soil health. Understanding these symptoms can help farmers adopt more scientific and sustainable fertilization practices.
### Cucumbers
1. **Interveinal yellowing**: This is often caused by excessive phosphate fertilizer, leading to zinc deficiency.
2. **Yellowing and whitening between veins**: Too much potassium fertilizer may result in magnesium deficiency.
3. **White veins with green margins**: Excessive phosphate application can cause magnesium deficiency.
4. **Brown edges along the veins**: This is typically due to potassium deficiency from over-application of phosphate.
### Tomatoes
1. **Stem cracking and hollow stems**: Overuse of nitrogen fertilizer can lead to calcium and boron deficiencies.
2. **Fruit drop with necrosis and rot**: High temperatures, dry conditions, or excessive nitrogen/potassium can impair calcium absorption.
3. **Green areas around fruit bracts**: Excess nitrogen combined with dry weather can cause potassium deficiency.
4. **Poor fruit coloring and dark brown spots**: Often linked to nutrient imbalances and poor drainage.
### Eggplants
1. **Longitudinal splitting and corking of sepals**: This is usually a result of excessive nitrogen, which hinders calcium uptake.
2. **Sunken and hardened fruit tips**: Too much nitrogen can interfere with water absorption.
3. **Brown spots on lower leaves**: Excess manganese due to poor drainage can be the cause.
### Peppers
The **tip of the pepper (flowering part)** may turn black and soft, often due to high calcium or potassium levels combined with high temperatures and dry conditions, leading to calcium deficiency.
### Cabbage
1. **Brown and rotten core**: Excessive nitrogen can lead to calcium deficiency.
2. **Brown leaf margins during head formation**: Again, this is commonly caused by nitrogen overload and calcium deficiency.
### Chinese Cabbage
1. **Brown and rotting parts of the plant**: Caused by excess nitrogen and calcium deficiency.
2. **Brown leaf margins during early growth**: Due to nitrogen overuse and high temperature.
3. **Black spots on leaf veins**: Insufficient sunlight and excess nitrogen can lead to nitrate toxicity.
4. **Squamous appearance on veins and petioles**: Caused by high calcium levels and elevated soil pH, resulting in boron deficiency.
### Artemisia annua
The **growing tip turns brown and necrotic**, and the plant stops growing. This is often due to excessive phosphate and dry conditions, leading to calcium deficiency.
### Celery
The **heart of the plant turns brown and rots**, typically caused by calcium deficiency from overuse of nitrogen or potassium.
### Spinach
1. **Dark green leaves turning brown**: Excess phosphorus can inhibit fertility.
2. **Yellowing between veins**: High soil pH can cause manganese deficiency, especially after heavy rain.
3. **Yellowing of new leaf margins**: Excess manganese can lead to iron deficiency.
### Radish
1. **Dark purple leaf margins with brown interveinal areas**: Indicates phosphorus imbalance and other nutrient issues.
2. **Dark brown center of the root**: High soil pH and excess calcium can lead to boron deficiency.
### Watermelon
1. **Small dark spots on leaves near fruit-setting area**: Excessive potassium can cause magnesium deficiency.
2. **Long vines and thick upper stems**: Often a result of excessive nitrogen, which affects fruit setting.
By recognizing these symptoms and adjusting their fertilization strategies accordingly, farmers can prevent many of these physiological diseases and ensure healthier, more productive crops. It's essential to maintain a balanced approach to nutrient management for long-term agricultural success.
Marble Bathroom Accessory Sets
Marble Bathroom Accessory Sets,Marble Bathroom Set Resin Bottle,White Marble Bathroom Accessories Set,Marble Bathroom Accessories Set
MingHui Houseware Company Limited , https://www.minghuihousewareltd.com