Xiao-Quan Zhang

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Differences in nitrogen metabolism were analyzed in mature leaves of three tobacco cultivars with different levels of resistance to brown spot disease (Alternaria alternata) including one resistant (JYH) and two susceptible cultivars (NC89 and CBH). The results were as follows: All three cultivars had low levels of both total nitrogen and leaf tissue NH4 +;(More)
Fang et al. (1), using forest inventory data to estimate changes in forest biomass carbon storage in China during the past 50 years, demonstrated that China's carbon storage in living forest biomass has increased since the 1980s. We appreciate their valuable effort; however, the equation used to estimate forest biomass [note 20 in (1)] is questionable. Fang(More)
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