农业试验地的选择培养和利用

试验地为田间试验创造了适宜的环境,试验地选择是否科学,关系着试验的可靠程度。本文简要介绍了试验地的相关情况,并对试验地的选择和培养利用进行了讨论。

农业科研试验用地的土壤改良与培肥

农业科研试验地是农业科技成果转化的重要载体。文章以中国农业科学院作物科学研究所试验基地为例,分析了试验地的特点,指出了试验地土壤改良和培肥的目标,并从优化耕作制度,制定合理的施肥和种植制度等方面提出了改良和培肥试验地的主要措施,以期使农业科研试验用地保持地力充裕,实现可持续发展。

Estimation of Soil Hydrodynamic Parameters Related to Agricultural Practices -Case of the Tougou Experimental Site （Burkina Faso）

This study aims to estimate the hydrodynamic properties of soils under various agricultural practices in the Tougou catchment in northern Burkina Faso. The methodology adopted is based on the determination of the unsaturated hydraulic conductivity and capillary sorptivity close to saturation. This method relies on the measurement of the transient infiltration flux at the soil surface with imposed hydraulic head varying from -60 to -20 mm. These tests are carried out on control, stony line, half-moon and zai plots. The results show a difference in hydrodynamic parameters according to the agricultural practices. The unsaturated hydraulic conductivity is 33.1 cm/h, 13.1 cm/h, 20.3 cm/h and 4.0 cm/h for zai, control, stony line and half-moon plots respectively. The unsaturated hydraulic conductivity is 33.1 cm/h, 13.1 cm/h, 20.3 cm/h and 4.0 cm/h for zai, control, stony line and half-moon plots respectively. The pores participating to water transfer also differ. The mean size of drainable pores is 43.7, 56.2, 22.3 and 87.2 pm on control, stony line, half-moon and zai plots respectively.