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In order to investigate the influence of the water consumption characteristics of onions in the Hexi Corridor, this paper tested the water consumption of onions in the Oasis by using the early golden dragon onion as a test material and randomly grouped it into different irrigation modes and cover methods. There were five treatments in the experiment, and the water consumption of onion was measured in each reproductive period, and the results showed that: (1) the soil water storage decreased with the increase of water loss, i.e. the soil water storage size was T1>T2>T3. The difference in soil water storage between black mulch and transparent mulch was smaller, but significantly larger than that of fine sand mulch. (2) The water consumption and water intensity of onion showed a decreasing trend with the increase of the adjustment loss, and the water consumption of fine sand cover > transparent mulch cover > black mulch cover. (2) The water consumption and water intensity of onions decreased with the increase of the regulation deficit, and the water consumption of fine sand mulch was more than that of transparent mulch and black mulch.

In order to investigate the influence of the growth characteristics of onions in the Hexi Corridor, this paper tested the growth characteristics of onions in the Oasis by using the early golden dragon onion as a test material and randomly grouped it into different irrigation modes and cover methods. There were five treatments in the experiment, and the growth characteristics of onion was measured in each reproductive period, and the results showed that: The transverse diameter and longitudinal diameter of bulb showed a decreasing trend with the increase of regulation deficit range. The transverse diameter and longitudinal diameter of bulb in T3 treatment were significantly lower than those in T1 and T2 due to the large amplitude of regulation deficit in the whole growth. There was no significant difference between T1 and T4, but it was significantly larger than T5. Moderate deficit and fine sand mulching were not conducive to the growth of bulb transverse diameter and longitudinal diameter.According to the growth characteristics of onion, the best regulation of onion growth can be achieved by covering the whole growth period with black plastic film and sufficient irrigation, which has theoretical guidance and reference significance for onion planting in Hexi irrigation area.

Since the 20th century, national investment in agricultural irrigation has been increasing, indicating that the state is paying more and more attention to the “Three Rural Issues”. Along with the national emphasis on the "Three Rural Issues" and the background of increasing economic investment in agricultural irrigation, irrigation technology has been developing rapidly in Gansu Province, which is reflected in the year-on-year expansion of efficient water-saving irrigation area. The goal of water-efficient irrigation technology is to improve the water utilisation coefficient, thus optimising the planting structure of crops and increasing crop yields. Therefore, a variety of high-efficiency water-saving irrigation technologies such as pipe irrigation, sprinkler irrigation and micro-irrigation have been vigorously promoted and applied. The article analyses the current status and benefits of high-efficiency water-saving irrigation infrastructure in Gansu Province, and aims to provide data support and theoretical guidance for the development and improvement of high-efficiency water-saving irrigation in the province.

OBJECTIVE: To compare the clinical features of children with different clinical forms of congenital hepatic fibrosis (CHF), and provides a description of the characteristics of childhood CHF. METHODS: Sixty children with CHF between January 2002 and June 2015 were enrolled, including 26 children with portal hypertensive CHF (PH CHF), 3 children with cholangitic CHF, 30 children with combined portal hypertensive and cholangitic CHF (mixed CHF), and 1 child with latent forms of CHF. The medical data of 26 children with PH CHF and 30 children with mixed CHF, including gender, age, clinical manifestations, physical signs, laboratory tests and imaging characteristics, were retrospectively studied. RESULTS: Fever, jaundice and hepatomegaly were more frequently noted in children with mixed CHF than in those with PH CHF (P < 0.05). Splenomegaly and liver cirrhosis occurred more often in children with CHF, but there was no significant difference in the incidences of splenomegaly and liver cirrhosis between the children with PH CHF and mixed CHF. The plasma prothrombin activity, white blood cell counts, platelet counts, mean platelet volume, serum levels of alanine transaminase, aspartate transaminase, alkaline phosphatase, γ-glutamyl transferase, leucine aminopeptidase, and total bile acids in children with mixed CHF were higher than in those with PH CHF (P < 0.05). The decreased international normalized ratio and lower serum albumin levels were more frequently observed in children with mixed CHF than in those with PH CHF (P < 0.05). CONCLUSIONS: PH and mixed CHF are common forms in childhood CHF. The children with the two forms of PH usually manifest portal hypertension such as cirrhosis and hepatosplenomegaly. The liver damage may be common in children with mixed CHF.