[Sap flow of Amorpha fruticosa in the secondary saline-alkali land in Ningxia Yellow River irrigation area, China.].

From May to October in 2017, the sap flow, water consumption and the effects of environmental factors on the sap flow of Amorpha fruticosas with different stem diameters under different water and salt conditions were examined with the packaged sap flow measuring system in a secondary saline-alkali land of Ningxia Yellow River irrigation area. The sap flow rate showed a broad peak curve with no obvious phenomenon of 'midday break' in sunny days and a multi-peak curve in cloudy, overcast and rainy days. Weak sap flow was found at night.

[Effects of water and fertilizer coupling on photosynthetic characteristics of maize leaves in ear position at filling stage in an apple-maize intercropping system in Losses Plateau of west Shanxi Province, China.].

Taking a typical apple×maize intercropping system in the loess region of Shanxi Pro-vince, China as test object, the current study analyzed the photosynthetic characteristics of maize leaves of ear position at filling stage under different irrigation and fertilization regimes. There were three irrigation levels [low (W), 50% field capacity (Fc); medium (W), 65% Fc; and high (W), 85% Fc], three fertilizer levels {F [N (289 kg·hm) + PO (118 kg·hm) + KO (118 kg·hm)]; F [N (412.4 kg·hm) + PO (168.