塑盖高速激光打标生产线的研制

论文介绍了自行研制的用于饮料包装行业中的新一代全自动塑盖高速激光打标生产线,主要包括理盖机、激光打标机和提升机,具有塑盖理盖、有序送料、激光打标和自动计数装箱四大功能。该生产线实现了塑盖完全自动化理盖上料,且理盖错误率小于0.01%;塑盖打标生产率不低于800个/分钟,打标误差率小于0.025%。

药用包装瓶盖新动向

近日，在厦门的一次医药包装展览会上发现，药用瓶盖的新动态，无论是防伪技术还是安全性能方面都有了很大的提高。

Effect of different mulch materials on winter wheat production in desalinized soil in Heilonggang region of North China

Freshwater shortage is the main problem in Heilonggang lower-lying plain, while a considerable amount of underground saline water is available. We wanted to find an effective way to use the brackish water in winter wheat production. Surface mulch has significant effect in reducing evaporation and decreasing soil salinity level. This research was aimed at comparing the effect of different mulch materials on winter wheat production. The experiment was conducted during 2002-2003 and 2003-2004. Four treatments were setup： （1） no mulch, （2） mulch with plastic film, （3） mulch with corn straw, （4） mulch with concrete slab between the rows. The result indicated that concrete mulch and straw mulch was effective in conserving soil water compared to plastic film mulch which increased soil temperature. Concrete mulch decreases surface soil salinity better in comparison to other mulches used. Straw mulch conserved more soil water but decreased wheat grain yield probably due to low temperature. Concrete mulch had similar effect with plastic film mulch on promoting winter wheat development and growth.

Soil Air Regime of Corn Field Under Plastic Mnlching

The effects of plastic inulching on soil aeralion at the soil dcpth uf 0-100 cm were studied in a corn tield.The resnlts indicated that the CO_2 concentration of unmulched soil in the 0-100 cm layer layer ranged from 0.00 1to 0.016 m￣3/m￣3, and that of mulched soil 0.002 to 0.018m￣3/m￣3, about 32.39% higher than the forrner on theaverage. Such a CO_2 concentration in the soil air is still suitable for crop growth. The O_2 concentration wasinversely correlated with CO_2 concentrat ion in the soil air ( unmulching r=-0.92￣(**), mulching r=-0. 79￣*). O_2concentration ranged from 0. 1 1 to 0. 17 m￣3/m￣3 in the mulched soil and 0. 1 3 to 0. 18 m￣3 /m￣3 in the unmulchedsoil. By contrast, N_2 concentration in soil air remained relatively steady, with no difference between the twotreatments. The relationship between the soil respiratory intensity and the depth of a soil layer appeared tobe a power function. At the layer of 0-20 cm, the soil respiration intensity in the mulched soil was obviouslyhigher than that in the unmulched. Plastic mulching could also affect soil structure. In comparison withthe unmulched soil, the content of >0.25 mm aggregate and 0.05-0.001 mm microaggregate in the mulched soil was reduced by 82.1% and 35.8%, respectively; the soil total porosity, gaseous phase rate and aerationporosity in the depth of 10-20 cm were reduced by 2.85%, 19.89% and 26.54% respectively, but contrary at the depth of 0-10 cm.

Quantitative characterization of sealing integrity by caprock of Paleocene Artashi Formation gypsolyte rock in Kashi Sag of Tarim Basin, NW China

Maintaining caprock integrity is prerequisite for hydrocarbon accumulation. And gypsolyte caprock integrity is mainly affected by fracturing. Composition, damage behavior and mechanical strength of Paleocene Artashi Formation gypsolyte rock that seals significant petroleum in the Kashi Sag of Tarim Basin had been revealed via X-ray diffraction and triaxial compression test. The results indicate the Artashi Formation can be lithologically divided into the lower and upper lithologic members. The lower member comprises gypsum as the dominant mineral, and the cohesion and friction coefficient are 8 MPa and 0.315, respectively. Similarly, the upper lithologic member consists mainly of anhydrite at the cohesion and coefficient of internal friction values of 18 MPa and 0.296. Given that the failure criterion and brittle-ductile transition factors during burial, the sealing integrity of Artashi Formation can be quantized for seven different stages. The reservoirs at the bottom of Artashi Formation caprock buried from 2285 m to 3301 m are expected to be the most favorable exploration target in the Kashi Sag.

Carbon Dioxide Fluxes and Concentrations in a Cotton Field in Northwestern China:Effects of Plastic Mulching and Drip Irrigation

In northwestern China, there has been a change from traditional cultivation system （TC） with no mulching and flood irrigation to a more modern cultivation system （MC） using plastic film mulching with drip irrigation. A field study was conducted to compare soil ＇C02 concentrations and soil surface COs fluxes between TC and MC systems during a cotton growing season. CO2 concentrations in the soil profile were higher in the MC system （3107-9212μL L-1） than in the TC system （1 275-8994 μL L-1） but the rate of CO2 flux was lower in the MC system. Possible reasons for this included decreased gas diffusion and higher soil moisture due to the mulching cover in the MC system, and the consumption of soil CO2 by weathering reactions. Over the whole cotton growing season, accumulated rates of CO2 flux were 300 and 394 g C m-2 for the MC and TC systems, respectively. When agricultural practices were converted from traditional cultivation to a plastic film mulching system, soil CO2 emissions could be reduced by approximately 100 g C m-2 year-1 in agricultural lands in arid and/or semi-arid areas of northern and northwestern China.