Abstract
Efficient use of nutrient and water through underground drip irrigation is one of the options to optimize sugarcane production with minimal ground water pollution. Experiments were conducted at the Japan International Research Center for Agricultural Sciences, Subtropical Research Station, Ishigaki, Okinawa, to (1) investigate the suitability of drip-tubing materials for fertigation, (2) find out the most suitable liquid poly feed fertilizer mixture and its application frequency, and (3) compare slow and rapid nutrient releasing granular fertilizers with liquid fertilizer mixtures in order to optimize sugarcane production. Stem cuttings and shoots of NiF 8 sugarcane variety were fertigated with the poly-feed 2, 3, 5, and 6 liquid fertilizer mixtures at different frequencies. Rapid (N-15 and N-16) and slow (424-70 and 424-140) nutrient releasing fertilizers were applied manually to sugarcane and irrigated through the drip system. Results showed that the growth of shoot-planted sugarcane in all treatment combinations was higher than that of stem-planted sugarcane. Vegetative growth of sugarcane was greatly promoted in irrigated, organic matter ameliorated soil compared to un-irrigated rapid nutrient releasing fertilizer mixtures. Among poly-feed fertilizers, the poly-feed 3 (15(N):30(P):15(K) + micro-elements) fertilizer mixture resulted in increasing height, diameter, and weight of stem of shoot-planted sugarcane, when compared to unirrigated organic matter amended soil by 44%, 10%, and 66% respectively. The increases of similar parameters in stem-planted sugarcane were 45%, 14%, and 38%. Moreover, fortnightly application of poly-feed fertilizers for stem and shoot planted sugarcane gave the highest growth performance while application of once in two months, resulted in the lowest. In addition, the highest growth performance in both shoot and stem-planted sugarcane was observed in the irrigated 424-70 slow nutrient releasing fertilizer mixture application. Super typhoon 120 was the most suitable tubing material for under ground drip systems in sugarcane cultivation. It is evident from results, that either fertigating of poly-feed 3 fertilizers fortnightly or slow nutrient releasing granular fertilizer (424-70) application linking with underground tubing material of drip line 2000 greatly promoted the sugarcane production; subsequently those practices could be extremely useful to minimize ground water pollution.
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Claims 13
Claim · model-written summary
Shoot-planted sugarcane grew more than stem-planted sugarcane across treatments.
Verbatim
e0“growth of shoot-planted sugarcane in all treatment combinations was higher than that of stem-planted sugarcane”
Claim · model-written summary
Irrigation and organic matter promoted vegetative growth relative to unirrigated rapid-release fertilizer.
Verbatim
e0“Vegetative growth of sugarcane was greatly promoted in irrigated, organic matter ameliorated soil compared to un-irrigated rapid nutrient releasing fertilizer mixtures”
Claim · model-written summary
Poly-feed 3 increased shoot-planted stem height by 44%.
Verbatim
e0“poly-feed 3 (15(N):30(P):15(K) + micro-elements) fertilizer mixture resulted in increasing height, diameter, and weight of stem of shoot-planted sugarcane, when compared to unirrigated organic matter amended soil by 44%, 10%, and 66% respectively”
Claim · model-written summary
Poly-feed 3 increased shoot-planted stem diameter by 10%.
Verbatim
e0“poly-feed 3 (15(N):30(P):15(K) + micro-elements) fertilizer mixture resulted in increasing height, diameter, and weight of stem of shoot-planted sugarcane, when compared to unirrigated organic matter amended soil by 44%, 10%, and 66% respectively”
Claim · model-written summary
Poly-feed 3 increased shoot-planted stem weight by 66%.
Verbatim
e0“poly-feed 3 (15(N):30(P):15(K) + micro-elements) fertilizer mixture resulted in increasing height, diameter, and weight of stem of shoot-planted sugarcane, when compared to unirrigated organic matter amended soil by 44%, 10%, and 66% respectively”
Claim · model-written summary
Stem-planted sugarcane height increased 45%.
- Taxon
- sugarcanee0
- Material
- stem-planted sugarcanee0
- Outcome
- similar parameterse0
- Direction
- increasese0
- Value
- 45%e0
Not reportedTreatmentComparator
Verbatim
e0“The increases of similar parameters in stem-planted sugarcane were 45%, 14%, and 38%”
Claim · model-written summary
Stem-planted sugarcane diameter increased 14%.
- Taxon
- sugarcanee0
- Material
- stem-planted sugarcanee0
- Outcome
- similar parameterse0
- Direction
- increasese0
- Value
- 14%e0
Not reportedTreatmentComparator
Verbatim
e0“The increases of similar parameters in stem-planted sugarcane were 45%, 14%, and 38%”
Claim · model-written summary
Stem-planted sugarcane stem weight increased 38%.
- Taxon
- sugarcanee0
- Material
- stem-planted sugarcanee0
- Outcome
- similar parameterse0
- Direction
- increasese0
- Value
- 38%e0
Not reportedTreatmentComparator
Verbatim
e0“The increases of similar parameters in stem-planted sugarcane were 45%, 14%, and 38%”
Claim · model-written summary
Fortnightly poly-feed gave the highest growth performance.
Verbatim
e0“fortnightly application of poly-feed fertilizers for stem and shoot planted sugarcane gave the highest growth performance while application of once in two months, resulted in the lowest”
Claim · model-written summary
Application once in two months gave the lowest growth performance.
Verbatim
e0“fortnightly application of poly-feed fertilizers for stem and shoot planted sugarcane gave the highest growth performance while application of once in two months, resulted in the lowest”
Claim · model-written summary
Irrigated 424-70 fertilizer gave the highest growth performance.
- Taxon
- sugarcanee0
- Treatment
- irrigated 424-70 slow nutrient releasing fertilizer mixture applicatione0
- Outcome
- growth performancee0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“highest growth performance in both shoot and stem-planted sugarcane was observed in the irrigated 424-70 slow nutrient releasing fertilizer mixture application”
Claim · model-written summary
Super typhoon 120 was identified as the most suitable tubing material.
Not reportedComparatorValue
Verbatim
e0“Super typhoon 120 was the most suitable tubing material for under ground drip systems in sugarcane cultivation”
Claim · model-written summary
Authors recommend fortnightly poly-feed 3 or granular 424-70 with drip line 2000 for production and pollution reduction.
Verbatim
e0“either fertigating of poly-feed 3 fertilizers fortnightly or slow nutrient releasing granular fertilizer (424-70) application linking with underground tubing material of drip line 2000 greatly promoted the sugarcane production; subsequently those practices could be extremely useful to minimize ground water pollution”
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