Iron deficiency is a common problem in paddy nursery cultivation, particularly in alkaline soils. Iron is a vital micronutrient, and its deficiency can lead to stunted growth in the seedlings, chlorosis (yellowing) of leaves, and reduced tolerance to pest and disease attacks. Fortunately, there are several solutions available to combat iron deficiency and promote healthy growth in paddy seedlings.
One of the most effective ways to address iron deficiency in paddy nursery is the application of ferrous sulfate. Ferrous sulfate is an iron salt that is highly soluble in water and can be easily absorbed by the roots of the seedlings. It is recommended to use 20-25 kg of ferrous sulfate per acre of paddy nursery, and the application should be done 10-15 days before transplanting the seedlings. Ferrous sulfate can be applied directly to the soil or dissolved in water and sprayed over the seedlings.
Another solution for iron deficiency in paddy nursery is the use of iron chelates. Iron chelates are organic compounds that bind to iron, making it easily available to the plants. Iron chelates are available in different forms, such as EDTA, DTPA, and EDDHA. Among these, EDDHA is the most effective in alkaline soils, which are prevalent in many paddy-growing regions. Iron chelates can be applied at a rate of 1-2 kg per acre of paddy nursery, mixed with soil or water and sprayed over the seedlings.
In addition to the above solutions, there are some cultural practices that can help prevent iron deficiency in paddy nursery. One such practice is the use of organic matter, such as compost or manure, which can improve the soil structure, fertility, and nutrient availability. Soil pH also plays a crucial role in iron availability, and maintaining it at optimal levels (around 5.5-6.5) can enhance iron uptake by the plants. Soil drainage is also important, as waterlogging can lead to anaerobic conditions that inhibit iron absorption.
In conclusion, iron deficiency is a significant problem in paddy nursery cultivation, but there are several solutions available to overcome it. Ferrous sulfate and iron chelates are effective in replenishing iron levels in the seedlings, while organic matter, soil pH, and drainage can promote healthy growth and iron uptake. By adopting these solutions, farmers can ensure that their paddy seedlings grow vigorously and produce a bountiful harvest.