Growth, yield, quality and dry matter partitioning in three flue-cured tobacco varieties at different topping times and nitrogen fertilization [Philippines]
1987
Carino, P.M.
Application of 70 kg N/ha to the minus one produced higher number of leaves than the unfertilized control. Lower number of leaves were produced by cv 279 and Reams 266 at 0 kg N/ha to the minus one. Total dry matter production and leaf area index were significantly affected by the interaction of topping and nitrogen level at the later stages of growth. At 72-100 DAT, higher TDM was produced by plants topped at late flower stage at 70 kg N/ha to the minus one. Similarly, highest LAI was produced by TEF and TLF at 70 kg N/ha to the minus one, TU and TEF at 35 kg N/ha to the minus one. The three varieties (cv279, Reams 266 and Coker 254) differ in growth rate but not yield, quality and dry matter partitioning. Likewise, topping time did not significantly affect the growth, yield and quality but affected the nicotine content, dry matter partitioning and sucker weight. Higher nicotine was observed with topping and subsequent desuckering. Likewise, dry matter partitioned to the leaves at the early stage of growth was higher than any plant part. At the later stage, leaf and stem dry weight were almost similar. Topping and subsequent sucker control significantly produced higher leaf dry weight than TU and UNT. The production of suckers was significantly affected by topping with TU producing the most suckers. Growth, dry matter partitioning, yield and chemical quality was significantly affected by nitrogen level. Higher LAI, CGR, TDM and LAR was observed at 35 and 70 kg N/ha to the minus one. Higher LWR and NAR, however, was produced at lower N level. Cured leaf yield, crop value, number of harvested leaves and nicotine content increased with nitrogen application
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