NPK se muraad kisi bhi khaad ya ghizaai hal mein mojood teen bunyadi macro nutrients hain: Nitrogen (N), Phosphorus (P), aur Potassium (K). Ghizaai bottleon par chhape hue NPK tanasub (maslan, 3-1-2) har ansar ke wazan ke hisaab se feesad ko zahir karta hai. Nitrogen patton wali nabataati nashonuma ko chalata hai, phosphorus jar ki nashonuma aur phoolon ko support karta hai, aur potassium pani ke jazb, bemariyon ke muqable mein muzahmat, aur pooday ki majmoi taaqat ko control karta hai.
اہم حقائق
- N (Nitrogen): essential for chlorophyll, proteins, and vegetative leaf growth
- P (Phosphorus): drives root development, flowering, and energy transfer (ATP)
- K (Potassium): regulates stomata, water uptake, enzyme activation, and disease resistance
- Ratio 3-1-2 is a common vegetative baseline; flowering stages often shift to lower N, higher P/K
- Deficiency symptoms are element-specific: yellow older leaves (N), purple tints (P), brown leaf edges (K)
- Hydroponic nutrient solutions must supply all three in precise ratios — soil buffers these naturally