Impact of drip fertigation on productivity of arecanut (Areca catechu L.)
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Date
2007-05
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Abstract
The present invstlgahon was conducted at Vittal, Karnataka. India during December 1996 to May 2006 to evaluate the effect of four fertigation levels (25, 50, 75 and 100% of recommended fertilizer dose, 100:18:117 gN:PK palm three frequencies of fern- gatian (10, 20 and 30 days) and two controls (control 1, i.e., dfip imgation without fenilizer application and control 2, i.e., drip with la)100%NPK soil application) on productivly and resource use efficiency of arecanut The enpenment was laid out in RBD incorporating factorial component (4 x 3 + 2) in 2-year-old arecanut plantation. Pooled analysis of 4-year data indicated thesignificantinfluence ofboth fenilizer dose and frequencyofiertigation on kernel yield of arecanul. Amongferugahon levels, the kernel yield was significantly higher in 75% NPKfertigation. ie.. 75.13.5:87.7g. N.P.K application per year (3721 kg ha)than in other levels (3083-3121 kgha-). The yields observed in 10 (3431 kgha-) and 20 days frequentiff (3382 kg ha1) were at par and significantly superior to monthly femganon frequency (2952 kgha I). Fertigahon of 75% NPK at 10 days frequency registered maximum yield (4017 kg ha1), wh:ch was closely Iollowed by fertlgation of 75% NPK at 20 days frequency (3924 kg ha-) and fertiganon of 100% NPK at 20 days frequency (3579 kg ha-). The yield increase with 75% NPK fertigated at 10 days interval was 100% over control 1 12008 kglra-I). Different fertigation levels registered higher dry matter partitioning to kernel, i e, 6.7-7 4% of the total biomass than no ierhlizer application (5.6%). A significant correlationbetweenbiomass accumulation in different parts and fertiganon levels indicates the importance of efficient application of nutrients at corr~ct time and quantity Leaf water potential increased significantly with increasein frequency of fedgation from 10 to 30 days interval.A strong linear correlation was observed between fertigation level and total root biomass. The root biomass increased considerably from 3.23 (no iertilizer) to 7.99 kg per palm (75% NPK). Significant relation between root biomass and organic carbon content in sail based on palynamial resession (R = 0.769) was also noticed Water use efficiency was significantly superior at 75% NPK applied at 10 days interval over 100% NPK appliedat sameinternal. However,it was atparwith 75 and 100% NPK applied at 20 days interval Agronomic nutrient use efficiency (ANUE) was significantly higher at 25% NPK (14.9 kg kernel produced per kg nutrient applied). Fertigation up to 75% NPK provided a higher ANUE than the combination of dnp itrigation and soil application of 100% NPK indicating greater producnon at lesser application rates. The 11-year study indicated that adoption of iertigation not only increaaesproductivlq, but also ensures higher efficiency of the two most critical inputs, ie., water and nutrients in mop production.
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Arecanut, Drip fertigation, Nutrient use efficiency, Water use efficiency
Citation
Agricultural Water Management Vol.90,pages 102-111