在沿海稻区和内地旱作区之间,有相当一部分土地为“两不宜”种植区,即不宜再扩种水稻,也不宜种植其他大田作物的盐碱地。由于稻田水洇返碱,有的地块含盐量已高达0.3 —0.45%,成为水旱田临界区影响粮棉产量的一大障碍。为此,我们进行了地膜覆盖棉田试验,总结出一套保全苗措施。1990年示范推广30亩,单产皮棉83.5公斤,亩创效益630元,其中安秀峰一亩碱 A considerable part of the land between the coastal rice paddies and the dryland in the hinterland is a “two unfit” planting area, that is, the expansion of paddy rice should not be extended and the saline-alkali soil of other field crops should not be planted. As the paddy field backwash, the salinity of some plots has been as high as 0.3 -0.45%, has become a major obstacle to grain yield in the critical area of ​​flood and drought. To this end, we conducted a cotton field cotton cover test, summed up a set of measures to protect seedlings. Demonstration in 1990 to promote 30 acres, yielding lint 83.5 kilograms, a benefit of 630 yuan per mu, of which An Xiufeng acre base