[Impact of Organic Amendment on the Bacterial Community and Rice Yield in Paddy Soil].

In this investigation, the influence of organic amendment on the structural and functional dynamics of soil microbial communities and its effect on rice productivity were examined. Five fertilization treatments from a 40-year field experiment were selected： no fertilizer （CK）, inorganic NPK fertilizer （NPK）, inorganic NPK combined with green manure （NG）, inorganic NPK combined with green manure and pig manure （NGM）, and inorganic NPK combined with green manure and rice straw （NGS）. The findings revealed that the organic amendment enhanced the soil organic carbon （SOC）, total nitrogen （TN）, and total phosphorus （TP） levels, alongside an increase in rice yield； notably, the most significant improvements were observed with the NGM treatment.

[Influence and assessment of biochar on the bioavailability of chlorobenzenes in soil].

A laboratory experiment was conducted to study the influence of biochar on the residues of chlorobenzenes (CBs) in soil. Two treatments as the control and the addition of 1% wheat straw biochar were designed. Three chemical extractions as butanol, HPCD and Tenax extractions and earthworm accumulation were used to assess the changes of the bioavailability of CBs in soil.

[Contribution of wheat rhizosphere respiration to soil respiration under elevated atmospheric CO2 and nitrogen application].

With the support of free-air carbon dioxide enrichment (FACE) system and by using isotope 13C technique, and through planting wheat (Triticum aestivum L., C3 crop) on a soil having been planted with maize (Zea mays L., C4 crop) for many years, this paper studied the effects of elevated atmospheric CO2 and nitrogen application on the delta 13C value of soil emitted CO2 and the wheat rhizosphere respiration.

[Effects of O3-FACE(ozone-free air control enrichment) on gas exchange and chlorophyll fluorescence of rice leaf].

O3-FACE (Ozone-free air control enrichment) platform has been established for observing the effect of elevated tropospheric ozone concentration on the gas exchange and chlorophyll fluorescence of two rice varieties (Wuyunjing 21 and Liangyoupeijiu). The results showed that high ozone concentration decreased the net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) of rice leaves. After 76d fumigation the decline in them for Wuyunjing 21 was as follows: 21.

[Photosynthetic damage induced by elevated O3 in two varieties of winter wheat with free air controlled enrichment approach].

O3-FACE (ozone-free air controlled enrichment) platform has been established for observing the photosynthetic damage induced by elevated O3 in functional leaves of two winter wheat (Tritcium aestivum L.) varieties (Yangmai 16 and Yannong 19) during grain filling stage. The results showed that the response trend of all the parameters was similar: (1) The net photosynthetic rate (Pn) decreased gradually and after 35 days of O3 treatment, Pn decreased by 56.