Effects of CaO on the Clonal Growth and Root Adaptability of Cypress in Acidic Soils

Cypress (Cupressus funebris Endl.) is a major tree species planted for forestland restoration in low-fertility soil and areas where rocky desertification has occurred. Calcium (Ca) fertilizer can adjust the pH of an important effect on growth cypress. Soil water losses are serious Southern China, acidification increasing, which results high calcium loss. However, adaptability cypress clones to different concentrations acidic soils not been studied. In this investigation, potted-plant experiment was set up with three oxide (CaO) (0, 3, 6 g·kg?1) added under local conditions 0 3 g·kg?1 nitrogen (N), phosphorus (P), potassium (K) fertilizer. The effects CaO growth, root development, nutrient uptake utilization efficiency were analyzed. absorption differed when applied degrees fertility. NPK fertilizer, treatments significantly increased clonal seedling height, basal diameter, dry-matter weight. addition, length, surface area, volume roots less than 2.0 mm diameter also increased, indicating that fine somewhat able adapt differing Ca levels lower fertility conditions. Moreover, N, P, accumulation highest treatment. After adding only weight significantly, development (including volume) D1–D3 classes (?1.5 diameter) elevated. When application reached g·kg?1, each organ decreased, as did all classes, addition excessive fertile could inhibit Ca-deficient low-quality soils, promote Ca. study provide basis determining optimal fertilization strategy growing China.