安徽省东至县是优质棉基地县,常年棉花种植面积1.2万hm2,一般为棉(麦)油两熟制,棉花施肥量普遍较大,在取得高产的同时,也增加了成本投入。为了充分发挥施肥的增产效应,需要寻求最佳施肥方案。本试验采用“3414”肥料效应试验设计方案进行田间试验,旨在通过试验,确定本地区棉花 Dongzhi County in Anhui Province is a high-quality cotton base counties. Annual perennial cotton planting area is 12,000 hm2. Generally, cotton (wheat) oil is double-cooked. The amount of cotton fertilizer applied is generally large, and the cost is also increased while high-yielding. In order to give full play to the fertilization yield effect, need to find the best fertilization program. This experiment uses the “3414” fertilizer effect test design scheme for field trials, designed to test to determine the region cotton