Publications

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the fumonisin b1 content in corn from north china, a high-risk area of esophageal cancer.fusarium moniliforme is the primary fungus contaminating corn throughout the world. fumonisin b1 (fb1) is the major metabolite of f. moniliforme. it has been shown that fb1 is the promoter and initiator of liver cancer in rat. the corn of cixian, in hebei province, the high-risk area for esophageal cancer in china, is often contaminated by this fungus. a total of 21 corn samples were collected from households in the cixian county. high levels of fb1 (88.90+/-13.1 microg/g) were found in 10 moldy ...200010905519
evaluation of the natural refuge function for helicoverpa arnigera (lepidoptera: noctuidae) within bacillus thuringiensis transgenic cotton growing areas in north china.the density of helicoverpa armigera (hübner) populations on bacillus thuringiensis berliner (bt) transgenic cotton, corn, peanut, and soybean; differences in its development on bt cotton and common (nontransgenic) cotton; and the potential for mating among populations from bt cotton fields and other crop fields were investigated in the suburbs of xinxiang city (henan province) and langfang city (hebei province) in the southern and northern parts of north china, respectively. although development ...200212216828
cry2ab tolerance response of helicoverpa armigera (lepidoptera: noctuidae) populations from crylac cotton planting region.helicoverpa armigera (hübner) (lepidoptera: noctuidae) is an important lepidopteran pest of cotton, gossypium hirsutum l., in asia. transgenic cotton expressing the cry1ac gene from bacillus thuringiensis (bt) has been widely planted for control of this pest. for managing the potential risk from resistance evolution in this pest, a new transgenic bt cotton containing cry1ac and cry2ab genes (gene pyramided strategy) was designed as a successor of cry1ac cotton. this article reports on levels of ...200919610441
nitrogen deposition and its contribution to nutrient inputs to intensively managed agricultural ecosystems.interest in nitrogen inputs via atmospheric deposition to agricultural ecosystems has increased recently, especially on the north china plain because of extremely intensive agricultural systems and rapid urbanization in this region. nitrogen deposition may make a significant contribution to crop n requirements but may also impose a considerable nutrient burden on the environment in general. we quantified total n deposition at two locations, dongbeiwang near beijing and quzhou in hebei province, ...201020349831
inorganic phosphorus fractionation and its translocation dynamics in a low-p soil.the translocation of different inorganic phosphorus (pi) forms in a low-p soil (langfang experimental station, hebei province, china) over time was investigated using p fractionation extraction and a (32)p tracer technique. the l-value and p availability of the soil was assessed using 5 different maize genotype (zea mays l.) cultivars. the results showed that the different pi fractions in the soil increased in the order of h(2)so(4)-extractable p (ca(10)-p) > na(3)c(6)h(5)o(7)-na(2)s(2)o(4)-extr ...201222609804
stratification and storage of soil organic carbon and nitrogen as affected by tillage practices in the north china plain.tillage practices can redistribute the soil profiles, and thus affects soil organic carbon (soc), and its storage. the stratification ratio (sr) can be an indicator of soil quality. this study was conducted to determine tillage effects on the profile distribution of certain soil properties in winter wheat (triticum aestivum l.) and summer maize (zea mays l.) systems in the north china plain (ncp). three tillage treatments, including no till (nt), rotary tillage (rt), and plow tillage (pt), were ...201526075391
field scale interaction and nutrient exchange between surface water and shallow groundwater in the baiyang lake region, north china plain.fertilizer input for agricultural food production, as well as the discharge of domestic and industrial water pollutants, increases pressures on locally scarce and vulnerable water resources in the north china plain. in order to: (a) understand pollutant exchange between surface water and groundwater, (b) quantify nutrient loadings, and (c) identify major nutrient removal pathways by using qualitative and quantitative methods, including the geochemical model phreeqc) a one-year study at a wheat ( ...201627372119
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