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Publication Date
1981
Description
Srylosanthes hamata cv. Verano was first introduced to Thailand in 197 5. In the northeastern part of the country where the climate is marginal and the soils are low in fertility, Verano appears to be one of the most suitable forage legumes used in pasture-improvement programs. Verano can be grown satisfactorily on most soils in the northeast. Oversowing the seed at 3.1 kg/ha on unploughed areas resulted in a density of 5-30 plants/m2, while in cultivated land the same amount of seed gave 20-45 plant/m2 • In a 3-year experiment under different seeding rates and cutting intervals Verano outyielded three commercial cultivars of S. humilis and S. guianensis more than 2-fold. Its dry-matter yield averaged over 5 tons(t)/ha/yr, and its competitive ability with natural weeds was high, permitting only 6-12% (by weight) weeds in most plots after the first year of establishment. The highest seed yield recorded for Verano grown in experimental plots was 1,200 kg/ha of podded seeds, while under normal practice the average Verano commercial seed production in the northeast was 900 kg/ha. Heavy grazing could be imposed on Verano seed-production plots with 110 reduction in seed yield provided grazing were terminated before soil moisture became limiting. Verano was affected by anthracnose (Colletotrichum gloeosporioides), but the damange was not serious. However, new accessions of this species are being evaluated for higher yield and better agronomf c characters.
Citation
Topark-Ngarm, A, "Verano Stylo in Semiarid Northeastern Thailand" (1981). IGC Proceedings (1977-2023). 2.
(URL: https://uknowledge.uky.edu/igc/1981/section12/2)
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Verano Stylo in Semiarid Northeastern Thailand
Srylosanthes hamata cv. Verano was first introduced to Thailand in 197 5. In the northeastern part of the country where the climate is marginal and the soils are low in fertility, Verano appears to be one of the most suitable forage legumes used in pasture-improvement programs. Verano can be grown satisfactorily on most soils in the northeast. Oversowing the seed at 3.1 kg/ha on unploughed areas resulted in a density of 5-30 plants/m2, while in cultivated land the same amount of seed gave 20-45 plant/m2 • In a 3-year experiment under different seeding rates and cutting intervals Verano outyielded three commercial cultivars of S. humilis and S. guianensis more than 2-fold. Its dry-matter yield averaged over 5 tons(t)/ha/yr, and its competitive ability with natural weeds was high, permitting only 6-12% (by weight) weeds in most plots after the first year of establishment. The highest seed yield recorded for Verano grown in experimental plots was 1,200 kg/ha of podded seeds, while under normal practice the average Verano commercial seed production in the northeast was 900 kg/ha. Heavy grazing could be imposed on Verano seed-production plots with 110 reduction in seed yield provided grazing were terminated before soil moisture became limiting. Verano was affected by anthracnose (Colletotrichum gloeosporioides), but the damange was not serious. However, new accessions of this species are being evaluated for higher yield and better agronomf c characters.
