论文部分内容阅读
农学家常常需要知道进行土壤保持措施的确切费用。这样可以帮助制定某一地区新的土壤保持措施或补充原有土壤保持措施,并进行由水引起的土壤侵蚀定量测量,规划适宜的土壤保持措施。 本研究试图测定: (1)在热带,土坡侵蚀对一种高风化土(氧化土)生产力的影响。 (2)模拟侵蚀裸露底土的化学特性和物理性。 (3)通常聚集在表土中的肥力是否可以用化学肥料补充在裸露底土中。 (4)施加最适当的养分,是否可以得到最高产量,物理因素和生物因素是否也节制产量。
Agronomists often need to know the exact cost of soil conservation measures. This can help to develop new soil conservation measures or replenish existing soil conservation measures in a given area and to conduct a quantitative measurement of soil erosion caused by water and plan suitable soil conservation measures. This study attempted to determine: (1) the impact of erosion on a highly weathered soil (oxide) productivity in the tropics. (2) simulate the chemical and physical properties of exposed subsoil. (3) Whether the fertility normally accumulated in the topsoil can be replenished in the bare soil with chemical fertilizers. (4) whether the most suitable nutrients are applied, whether the highest yield can be obtained, and whether the physical and biological factors also control the yield.