Detailed Explanation of Sesame Nutrient Deficiency Symptoms and Remedial Measures
Sesame is a common crop, cultivated in many regions of our country. For farmers, the pursuit for crops is high yield and high quality, and the same is true for sesame. Only when the plants grow well can high yield occur, but poor sesame growth is generally caused by nutrient deficiency. Below, let's learn together with the editor about the symptoms of sesame nutrient deficiency and the remedial methods.
I. Sesame Nutrient Deficiency Symptoms
1. Deficiency of nitrogen, phosphorus and potassium
Sesame is a crop with a relatively high nitrogen demand. If nitrogen is deficient at the seedling stage, it will cause its leaves to turn green and stand upright, the basal leaves to become lemon yellow or orange yellow, and the plants to be short and small. If nitrogen is deficient at the flower bud stage, it will cause the plants to mature early, affecting the final yield. Phosphorus deficiency in sesame will cause the basal leaves to appear dark black to grayish green; potassium deficiency will cause the edges of the old basal leaves to curl upward in a wavy manner, with lemon chlorotic mottling, gradually turning bright orange-yellow, until bronze-colored.
2. Deficiency of boron, zinc and calcium
The zinc element affects the synthesis of auxin in plants. When sesame is deficient in zinc, leaf differentiation is hindered, resulting in smaller leaves, and the plants will also be short and small; the boron element has a great influence on pollen differentiation and reproductive growth of sesame. When the soil is deficient in boron, the flowers are small, the capsule tips have obvious blighted spots, and they are extremely easy to drop; calcium deficiency easily causes necrosis of leaf tips, leaf shrinkage, withering of roots and stems, and lodging of plants. Generally, acidic soil has a lower calcium content, and if combined with rainwater leaching, calcium deficiency is extremely likely to occur.
3. Deficiency of magnesium, manganese, sulfur and copper
When sesame is deficient in magnesium, the areas between the veins of the basal leaves will become chlorotic, while the veins remain green, and it is extremely easy to cause the leaves to wither and drop; sesame is relatively sensitive to manganese fertilizer, and manganese deficiency will cause dark green stripes to appear along the veins, with small necrotic spots appearing between the veins. The sulfur element affects oil formation, and sesame has a relatively large demand for the sulfur element; sulfur deficiency will affect yield and quality; copper deficiency will show weak growth, yellowing and loss of green in new leaves, clustered lateral buds, and hindered reproductive development of buds and flowers.
II. Remedial Methods
The three elements nitrogen, phosphorus and potassium are relatively easy to remedy. They can be improved by topdressing fertilizers such as urea, ammonium sulfate, superphosphate, and potassium chloride, or supplemented by foliar spraying of urea solution. The zinc element can be supplemented by spraying a low-concentration zinc sulfate solution on the leaves; for the boron element, a 1%-2% borax solution can be sprayed; for calcium deficiency, a 0.3% calcium chloride aqueous solution can be sprayed on the leaves; for magnesium deficiency, a 1%-2% magnesium sulfate solution can be sprayed on the leaves; for manganese deficiency, a 1% manganese sulfate solution or EDTA chelated fertilizer can be sprayed on the leaves; for sulfur deficiency, sulfur-containing fertilizers such as ammonium sulfate and potassium sulfate can be topdressed.
The above is an introduction to the symptoms of sesame nutrient deficiency and remedial measures. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.