关键词: 绿洲农业, 种植方式, 粮草间作, 土壤风蚀, 土壤水分

Abstract: Electrophysiological methods were adopted to study the effects of different concentration nonylphenol (NP) on the impulse generation and conduction of sciatic nerve stem in  Rana nigromaculata . After treated with different concentration NP for 7 days, the activity and cutis characteristics of  R. nigromaculata were examined, and the performance parameters of sciatic nerve stem, including impulse conduction velocity, action’s potential peak value, and relative and absolute refractory periods, were measured with biological signal recording and processing system. Increasing NP dosage weakened the R. nigromaculata activity, and produced more blood spots on cutis, suggesting that NP could induce the abnormality of  R. nigromaculata activity, energy, and cutis. When the NP concentration increased, the impulse conduction velocity of sciatic nerve stem gradually slowed down, the peak value of action’s potential decreased, and the relative and absolute refractory period extended, which implied that there was a NP dosage-effect relationship. NP could decrease the sensitivity of  R. nigromaculata  sciatic nerve, and inhibit its impulse generation and conduction. No significant difference was observed in the nerve action between the control and the treatment 50 mg NP·kg^-1 , suggesting that  R. nigromaculata  had definite tolerance against lower concentration NP.

Key words: Oasis agriculture, Cultivation mode, Crop-grass intercropping, Soil wind erosion, Soil moisture