Vol. 20 No. 11 (2022)

The experiments were conducted to evaluate the growth, yield and grain quality of some quality rice varieties in the autumn season 2019 and the spring season 2020 in Dong Hai, Quynh Phu, Thai Binh. The experiments were arranged in a Randomized Complete Block Design (RCBD) with three replications. Six quality rice varieties (VR3, VR4, VT18, HN01, ĐHS15, Thai Thinh) and the control variety Bac Thom 7 (BT7) were evaluated. The results showed that all of rice varieties were early maturing and intermediate in plant height. The highest yield was observed in VNR3 variety (65.0 quintals ha-1) and VNR4 variety (65.6 quintals ha-1) in the autumn season, and in ĐHS15 variety (66.6 quintals ha-1) and Thai Thinh variety (64.4 quintals ha-1) ha) in the spring season. Seven rice varieties had similar husked rice and milled rice percentage in both seasons. However, the milled head rice percentage fluctuated considerably among varieties. All of rice varieties had low amylose content (13.2% to 16.3% in autumn season and 11.9% to 14.0% in spring season), soft gel consistency and intermediate gelatinization temperature. The total eating quality assessment indicated that HN01 variety was ranked good in quality and the rest of the varieties were ranked intermediate in quality. Based on the characteristics evaluated, Thai Thinh variety was considered as a promising rice variety in Thai Binh province.

The present study analyzed the current situation and proposed solutions to develop Shan tuyet green tea production in Bac Yen district, Son La province. The study surveyed 90 Shan tuyet tea producing households, 15 government officials, 5 input suppliers and consumers in Bac Yen district. Descriptive and comparative statistics and costs and returns analysis were used to assess the current situation of Shan tuyet tea production development in Bac Yen district. The results showed that the productivity of Shan tuyet tea in Bac Yen was low and the processing and preservation technology were backward. In addition, the supports in the past time were not timely and at low level; the infrastructure of the tea production area was still lacking and weak together with a weak market connectivity rendering lower efficiency of Shan tuyet tea production as compared to its potential. Therefore, a number of solutions for the development of Shan tuyet tea production in Bac Yen district were proposed such as planning tea areas, investing in infrastructure, strengthening agricultural extension and technology transfer, capital support, trade promotion, and tea production development associated with tourism development.