Crop Specificity: Citrus tree
Citrus fruit crops are one of the most commonly grown fruit crop in the World. The citrus group consists of several species with the greatest importance of: lemon (Citrus limon), orange (Citrus sinensis), mandarin (Citrus reticulata, C. deliciosa), grapefruit (Citrus x paradisi), lime (Citrus aurantiifolia), Seville orange (Citrus aurantium), pummelo (Citrus maxima), citron (Citrus medica) and kumquat (Fortunella margarita/ Citrus margarita).
All of the citrus crops are cultivated in subtropical or tropical regions with growing temperatures 24–270C and intolerance to frost.
Citrus plants are typically evergreen shrubs or small- to medium-sized trees. The most suitable soils for citrus growing are sandy loams with low level of ground water.
Therefore, plant nutrition takes a predominant role in successful citrus crop cultivation.
Citrus plants have high requirements for nitrogen (N) which effects plant growth and yield. Efficiency of soil applied nitrogen could be improved by foliar application of N, especially at critical growth stages such as intensive shoot and leaf growth and beginning of fruit development. For both those stages PLONVIT NITROMAG and/or PLONVIT OPTY could support plants with proper dose of nitrogen and other macro- and microelements as well.
High yield of citrus plants and high quality of fruit are resulted from balanced supplying plants with other macronutrients, especially potassium (K) and calcium (Ca). Foliar applied PLONVIT KAPLPRIM after fruit set could significantly improve supplying plants with K since application of PLONVIT CALCIUM TURBO increases fruit firmness and resistance of fruit skin to cracking and creases. A good supply of citrus with calcium is also resulted from using of OPTYCAL – calcium activator, which simultaneously stimulates the uptake of calcium from the soil and directly increases the content of this ingredient in plants.
It is well known, that all citrus species require high level of supplying with microelements, especially boron (B), iron (Fe), manganese (Mn), zinc (Zn) and copper (Cu). Those nutrients have direct effect on a number of natural plant processes such as photosynthesis, pollination, fruit set and fruit development, sugar and acid metabolism etc. Their effectivness could be supported by application of: AMINOCHELAT Fe-20 or MIKROCHELAT Fe-13, AMINOCHELAT Mn-22 or MIKROCHELAT Mn-13, AMINOCHELAT Zn-24 or MIKROCHELAT Zn-15, AMINOCHELAT Cu-24 or MIKROCHELAT Cu-15. Also, since boron is hardly taken up by plants from soli, foliar application of MIKROVIT BORON (or MIKROVIT BORON TURBO or MIKROVIT BORON PLUS) could supply citrus plants with B to improve not only pollination and fruit set processes but also increase fruit quality.
Citrus crop plants grow intensively. Therefore, support of plant growth and increase tolerance to stresses could be very beneficial for yield quantity and quality. Foliar applications of TYTANIT and OPTYSIL may stimulate plants not only for better growth and yield but also for improvement of tolerance to abiotic (weather conditions) and biotic (disease and pest appearance) stresses.