Zinc fertigation studies in Nagpur mandarin (Citrus reticulata) grown on black clay soil

Abstract

A field experiment was conducted for four seasons (2013–17) on 12-year-old bearing Nagpur mandarin (Citrus reticulata Blanco) plants budded on rough lemon rootstock (Citrus jambhiri Lush) at ICAR-Central Citrus Research Institute, Nagpur, Maharashtra. Six zinc-based treatments, viz. S100 as soil application of ZnSO4 (100 g/plant), S200 as soil application of ZnSO4 (200 g/plant), S300 as soil application of ZnSO4 (300 g/plant, F100 as fertigation of ZnSO4 (100 g/plant), F200 as fertigation of ZnSO4 (200 g/plant) and F300 as fertigation of ZnSO4 (300 g/plant) with uniform doses of macronutrients (450 g N + 150 g P2O5 + 150 K2O/tree/year) were evaluated in a randomized block design (RBD) with four replications on a smectite rich alkaline black clay soil. Significantly higher concentration of Zn in index leaves was observed with fertigation treatments than soil application treatments with regard to fruit yield and quality. The fruit yield was observed significantly lower with soil application of ZnSO4 (11.5–13.95 tonnes/ha with S100-S300) than fertigation treatments (15.6–16.4 tonnes/ha with F100-F300). The fruit quality parameters were observed much higher with F200 followed by F300. On the other hand, the lowest acidity (0.82%) and higher TSS to acidity ratio (11.52) were observed with F200. Hence, the treatment F200, split through 4 pulses at 40 days interval from anthesis to the fruit development stage proved highly efficient for quality production of Nagpur mandarin in central India.

Effect of fertigation levels on fertilizer use efficiency, yield, quality and economics of Robusta coffee

“…In addition, NPK are the most indispensable nutrients for the growth and development of coffee, similar to any other crop, as nitrogen is essential for coffee plants throughout the year, phosphorus is essential during the blossom period (flowering), and potassium is essential at the time of berry maturation, bean filling and hardening (Anonymous, 2014). The results of the present study are also in accordance with the findings of Venkataramanan (1988) and Shirgure et al (2001), who reported that fertigation increased the total number of branches and number of bearing nodes in coffee and in Nagpur mandarin, respectively. Vaidehi et al (2017) also reported that the increase in yield parameters under drip irrigation is due to better water utilization, minimum losses of water through percolation and evaporation, and an excellent soil–water–air relationship with higher oxygen in the root zone and higher uptake of nutrients.…”

Effect of Irrigation Levels on Growth and Fruiting of Manfalouty Pomegranate Trees Grown in New Reclaimed Region

“…In appropriate irrigation pursuits damage fruit quality by reducing nutrients uptake from the soil (Hutton et al, 2007 andQuiñones et al, 2007). Highest nutrient uptake and minimum nutrient filtrating were obtained by using modern irrigation arrangement (Shirgure and Srivastava, 2013). Such findings were found in our study, the maximum nutrient contents N, P and K in leaf of Manfalouty pomegranate were recorded for trees growing with 80% of the estimated amount of water compared with trees under 60 or 100% of estimated amount water.…”