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丘陵地区以岗、塝、冲田梯度分布为主要特征.岗田地势最高,长期受雨水冲刷,土壤耕作层浅,肥力低下;冲田土壤潜在肥力较高,但地下水位高,质地粘重,透气性不良;塝田则介于两者之间.因此,岗、塝、冲田的土壤肥力呈梯形逆向分布.气候条件,梅雨与伏旱并存.岗田保水性差,灌溉效率低.不同类型水稻在岗、塝、冲田的生育进程、根量、分蘖消长和干物质积累等特征特性方面表现各异.
The hilly region is characterized by the gradient distribution of hillock, hillock and red field. The topography of Gangda is the highest, with long-term erosion by rainwater, shallow soil tillage and low fertility. The potential fertility of red soil is high, but the groundwater level is high, Poor; 塝 Tian is between the two.Therefore, the soil fertility of Kong, 塝, red field was trapezoidal reverse distribution.Climate conditions, rainy season and drought coexist.Gan field water retention is poor, low irrigation efficiency.Different types of rice in the post, 塝, Red tillage fertility process, root volume, tiller growth and decline and dry matter accumulation characteristics of different performance.