Sapota, also known as chikoo, is an important fruit crop grown widely in many parts of India. Since sapota is a perennial tree crop, proper fertilizer management is very important for healthy tree growth, regular flowering, and good fruit yield. Many farmers face problems like poor vegetative growth, flower drop, small fruits, or irregular bearing mainly due to improper nutrient management. Managing fertilizers in a balanced and timely manner helps sapota trees remain productive for many years.
The first step in fertilizer management is understanding the age of the sapota tree. Young plants and bearing trees have different nutrient needs. In the early years, the focus should be on vegetative growth, while in mature trees, nutrients are needed for flowering, fruit development, and fruit quality.
Organic manure forms the base of sapota nutrition. Well-decomposed farmyard manure or compost improves soil structure, water-holding capacity, and microbial activity. For young sapota plants, a smaller quantity of organic manure is sufficient, while bearing trees require higher amounts. Organic manure should be applied once a year, preferably at the beginning of the monsoon. It should be spread evenly in a circular basin around the tree and lightly mixed with the soil.
Along with organic manure, chemical fertilizers supplying nitrogen, phosphorus, and potassium are required. Nitrogen supports leaf growth and overall tree vigor. Phosphorus helps in root development and flowering, while potassium plays a major role in fruit size, sweetness, and resistance to stress. Fertilizers should be applied in balanced amounts, as excess use of any one nutrient can harm the tree.
Fertilizers are usually applied in two split doses in a year. The first dose is given at the start of the monsoon to support new growth. The second dose is applied after the monsoon or before flowering. Splitting the fertilizer helps in better nutrient use and reduces losses due to leaching. Fertilizers should not be applied very close to the trunk. They should be placed in a ring at some distance from the stem where active roots are present.
Micronutrients are also important for sapota, especially zinc, iron, and boron. Zinc deficiency causes small leaves and poor growth, iron deficiency leads to yellowing of young leaves, and boron deficiency affects flowering and fruit development. If deficiency symptoms appear, micronutrients can be applied through soil or foliar spray for quick correction.
Water management is closely linked with fertilizer use. Adequate soil moisture helps nutrients dissolve and reach the roots. After fertilizer application, light irrigation helps improve nutrient uptake. At the same time, waterlogging should be avoided, as it damages roots and reduces nutrient absorption. Mulching around the tree with dry leaves or organic material helps conserve moisture and improves fertilizer efficiency.
Weed control around the tree basin is also important. Weeds compete with sapota trees for nutrients and water. Keeping the basin clean ensures that applied fertilizers are fully utilized by the tree.
In conclusion, fertilizer management in sapota should focus on regular application of organic manure, balanced use of nitrogen, phosphorus, and potassium, attention to micronutrients, and proper timing. Applying fertilizers based on tree age and growth stage, along with good irrigation and weed control, helps sapota trees grow healthy and produce good quality fruits year after year.
