北方水稻旱育稀植栽培技术的研究 第2报.北方几种不同土壤地区水稻旱育秧技术

STUDY ON RICE CULTURAL TECHNIQUE OF DROUGHT SEEDLING AND SPARSE PLANT IN THE NORTH——Ⅱ.RICE DROUGHT SEEDLING TECHNIQUE FOR VARIOUS SOIL REGION IN THE NORTH

研究发现旱育秧过程中盐渍化、石灰性土壤 pH 的变化与非盐渍化土壤有重大差别,阐明了我国北方沿用旱育秧引进技术调酸标准而育秧效果不稳定的主要原因,并提出我国北方4种土壤类型地区旱育秧床土调制技术标准;针对我国北方气候特点提出控制旱秧田棚内空气湿度,以防止极端干燥高温危害;试验改进提出了隔离层成苗旱育秧技术,适应于各种不同土壤类型地区。上述研究结果的应用解除了我国北方旱育秧立枯病和青枯死苗的严重危害,在各种土壤地区成功培育出旱秧苗,在国内外首次提出石灰性土、氯化钠盐碱土稻区旱育秧技术。

Result showed that variation of pH value of salinization and calcare- ous soil was different from non-salinization significantly during culti- vating seedling of rice.It was clarified why effect of drought sedling was unstable when the introduced pH standards were used in the north.Technical standards of seed bed soil for four soil type in the north were worked out. According to climate in the north,a technique to controll air humidity in Plastic-house was put forward to preventing the evils of dry air and high temperature. Anther technique in which isolation layer was used in drought-seedling can be applied to various soil type in the north. With these techniques,the evils of rice damping off and wilt could be relieved and strong rice shoots could be raised. The drought seedling technique used in the rice region with calcareous soil or NaCl salinized sci was first Put forward.