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【目的】从农作物种植模式角度出发,研究玉米与不同作物间作条件下农田土壤氨挥发特征。【方法】采用田间通气法,2008—2009两年设置大田试验,研究玉米与大豆、黑麦草、苜蓿以及花生间作对田间土壤NH3挥发的影响。【结果】两年的试验结果初步显示,在玉米各个生育时期玉米‖黑麦草和玉米‖大豆模式的田间NH3挥发多数高于玉米单作(对照)处理,而玉米‖花生和玉米‖苜蓿模式在玉米各个时期的NH3挥发基本都低于对照模式;整个玉米季,玉米‖花生和玉米‖苜蓿模式的田间NH3挥发总量低于玉米单作模式,分别可减少6.77—17.42 kg.hm-2、1.53—23.63 kg.hm-2。【结论】在玉米生产中通过引入适宜的植物与其间作对于降低田间NH3挥发量具有可行性。
【Objective】 The objective of this study was to study the characteristics of ammonia volatilization in agricultural soils under the intercropping of maize and different crops from the viewpoint of cropping patterns. 【Method】 A field experiment was conducted in 2008-2009 to study the effects of maize and soybean, ryegrass, alfalfa and peanut intercropping on the NH3 volatilization of field soils. 【Result】 The results of two years preliminary showed that the field NH3 volatilization in maize “ryegrass” and “corn” soybeans was higher than that in maize single cropping (control) at different growth stages of maize, while that of maize “peanut and maize” The NH3 volatilization of maize was basically lower than that of the control mode. The total amount of NH3 volatilization in the maize, maize and maize alfalfa fields was lower than that of the maize monocropping system by 6.77-17.42 kg.hm-2, 1.53-23.63 kg.hm-2. 【Conclusion】 It is feasible to reduce the amount of NH3 volatilization in the field by introducing suitable plants and their intercropping.