Study on optimum fertilizer application for asparagus
1994
Narong Polwong | Tanongsak Maneewan | Punpen Sangsai (Lampang Agricultural Research and Training Centre (Thailand))
Study on optimum fertilizer application for asparagus is subproject of asparagus development research for export project. It was conducted to operate at Lampang Agricultural Research and Training Centre (LARTC) between April 1991 to August 1993 and 4 variety of asparagus [MW(USA), F2UC 157,UC309(USA), Brock's Improved] were used to main plot in each subproject. It was devided to 2 experiments which were as follow. Experiment 1: This experiment aimed to study the optimum fertilizer ratio (N:P2:O5:K2O). Treatments were (1) 1:1:1 (2) 2:1:2 (3) 3:2:3: and 150 kg per rai of nutrient was applied for each treatments. The results showed no significant difference between fertilizer ratios, but 1:1:1 and 2:1:2 tend to be higher than 3:2:3. Besides that we found that 2:1:2 tend to be suitable for Brock's Improved variety which was high yield variety of this experiment. There is no interaction between fertilizer ratio and asparagus varieties. Experiment 2: This experiment aimed to study optimum rate of chemical fertilizer (ratio 1:1:1) for asparagus. Treatments were 100, 150 and 200 kilogram of nutrient per rai. The result revealed that the optimum rate was 150 kg per rai but it was not significant difference from the others. Brock's Improved variety was still the highest yield. There is no interaction between fertilizer application rate and asparagus varieties.
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