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【Objective】In order to provide references for exploring the suitable application amount of organic and inorganic compound fertilizer for flue-cured tobacco K326 in dry land of Hezhou tobacco-growing area, the application amounts of different organic and inorganic compound fertilizer for flue-cured tobacco were compared.【Method】Taking fluecured tobacco variety K326 as experimental material, with conventional fertilization as control (CK), experiments were carried out in Fuchuan, Hezhou in 2021 to analyze the effects of different application amounts (1 500 kg/hm2, 1 725 kg/hm2, 1 950 kg/hm2)of organic and inorganic compound fertilizer for flue-cured tobacco on the yield and quality of K326.【Result】The yield and average single leaf weight of tobacco leaf increased with the increase of N application rate, and the output value of tobacco leaf and the proportion of superior tobacco were the highest under 1 950 kg/hm2 treatment.The nicotine content in the middle leaves was in the appropriate range under the treatments of 1 500 kg/hm2, 1 725 kg/hm2 and 1 950 kg/hm2, while the nicotine content in CK leaves was higher.The chemical composition coordination of the middle leaves was showed as: 1 500 kg/hm2 treatment > 1 725 kg/hm2 treatment > 1 950 kg/hm2 treatment > CK, and that of the upper leaves was showed as: 1 500 kg/hm2 treatment > 1 950 kg/hm2 > 1 725 kg/hm2 treatment=CK, and the overall composition coordination was the best under 1 500 kg/hm2treatment.The physical properties of the middle leaves ranked as: 1 500 kg/hm2 treatment > 1 950 kg/hm2 treatment > 1 725kg/hm2 treatment > CK and that of the upper leaves ranked as: 1 500 kg/hm2 treatment=1 725 kg/hm2 treatment=1950 kg/hm2treatment > CK.The sensory quality was better under the treatments of 1 500 kg/hm2 and 1 725 kg/hm2, which showed better aroma quality and sufficient aroma volume, and the irritation of the middle leaves was obviously less.The treatment of 1 725kg/hm2 got the highest score in comprehensive evaluation.【Conclusion】In Hezhou tobacco-growing area, the yield and quality of tobacco leaves were better when the application amount of organic and inorganic compound fertilizer for K326 fluecured tobacco was about 1 725 kg/hm2.

TSM basin analysis of Neoproterozoic prototype basins on Yangtze Craton, South China were studied using a large number of field outcrop sections, latest drilling data, and numerous previous studies. Controlled by the Qingbaikou convergent continental margin to the Nanhua-Sinian divergent continental margin, four phases of basin evolution are identified in the Neoproterozoic Yangtze Craton: a) the early Qingbaikou period(ca. 1 000-820 Ma), with back-arc spreading basins on the western and northern Yangtze margins and the interior, and a retro-arc foreland basin on the southeastern Yangtze margin; b) the late Qingbaikou period (ca.820-720 Ma), with back-arc spreading basins on the western and northern Yangtze margins and extensional down-faulted basins on the southeastern Yangtze margin and the interior of the carton; c) the Nanhua period (ca.720-635 Ma), with rift basins on the southeastern, western, and northern Yangtze margins and the interior; and d) the Sinian period (ca. 635-541 Ma), with intracratonic rift basins in the interior of Yangtze Craton (i.e. the central Sichuan, the Wanyuan-Dazhou and the west Hubei-east Chongqing area) and divergent marginal subsidence basins on the southeastern and northern Yangtze margins. The Nanhua rift basins and the Sinian divergent marginal subsidence and intracratonic rift basins were most conducive to source rock formation. The southern Shaanxi, northeastern Sichuan, western Hubei, central Sichuan and the adjacent area of Hunan, Guizhou and Chongqing are the most favorable areas of the Neoproterozoic source rocks in the Yangtze Craton. They are also considered to be favorable regions for deep natural gas exploration on the Yangtze Craton.

Objective To describe the content of nutrients and three environmental contaminants for "overseas online shopping" infant formulas. Methods 18 kinds of "overseas online shopping" infant formula and 14 kinds of domestically purchased infant formula were collected, and their nutritional composition and 3 environmental chemicals were analyzed and compared. Results Four kinds of "overseas online shopping" infant formula did not meet the GB 10765-2010, and the nutrient contents of "overseas online shopping" infant formulas were significantly different from those domestic purchased (P