我国棉花科学技术工作,是从我国棉花生产特有条件出发来进行研究和推广的。这些特点是:(1)绝大多数棉区地少人多,粮食需求量大,棉农口粮基本上是自给自足,粮棉矛盾较突出。全国有近半数的棉田实行粮(油)棉两熟栽培,棉花增产主要靠提高单位面积产量。(2)棉田地块小,经 China’s cotton science and technology work, starting from the unique conditions of China’s cotton production for research and promotion. These characteristics are as follows: (1) In the vast majority of cotton areas, there are fewer people and less food. The cotton ration is basically self-sufficient and the contradiction between grain and cotton is more prominent. Nearly half of the cotton fields in the country implement grain (oil) cotton two-crop cultivation. The increase in cotton production mainly depends on the improvement of yield per unit area. (2) cotton plots small, by