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In order to investigate the theoretical foundation of irrigation method for tobacco production with water saving and quality regulating, the effect of alternate partial root-zone irrigation on leaf physiological characteristics, water use and main quality indices of flue-cured tobacco during different growth stages under two fertilization levels was studied in a pot experiment.

为寻找烟田节水调质灌溉方式的理论依据，本文通过盆栽试验研究了两种施肥条件下，不同生育时期分根区交替灌溉对烤烟生理特性、水分利用以及主要品质指标的影响。

This paper took bamboo forest which is in the district of Huangshan in Anhui Province without human disturbance as the research object, making research on dynamic changes of chemical properties and enzyme activities of rhizosphere soil at different growth stages of bamboo, aiming at providing theoretical basis for precise fertilization in root region of bamboo, and improving fertilizer efficiency. At the same time, we made an analysis about the effects of fertilization on bamboo seedlings, and established the DRIS nutritional diagnosis to provide theoretical basis for the management of seedling bamboo nutrition. The main conclusions are as follo...

本文以安徽省黄山区无人为经营毛竹林为研究对象，对其不同生长阶段根际土壤化学性质、酶活性等动态变化进行了研究，以期为毛竹根区精准施肥，提高肥效提供理论参考；同时，分析了毛竹实生苗苗期施肥效应，建立了DRIS营养诊断方法，旨在为指导毛竹苗期营养管理提供理论依据。

However, the fine root and the litter are main resource of soil C and N.

但是，细根和调落物是土壤中碳、氮的主要来源。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。