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近几年来我区的洞庭湖平原及其东岸丘陵区,在早稻移栽后,出现大面积坐蔸麻叶现象。一般占早稻面积的百分之二十至三十,阴雨低温年更甚,湖区比丘陵和山区更严重。如1980年华容县就有8万亩早稻坐蔸,常使早稻严重减产,甚至失收,严重阻碍我区粮食产量的提高。 为探讨早稻坐蔸主要发生原因,我所从1975年以来,六年中先后在湘阴县,岳阳县、华容县等地一万多亩成片坐蔸早稻田进行调查分析和典型生产队的田间定位试验,通过植株土壤肥料对比分析研究证明早稻坐蔸的主要原因是土壤营养生态不平衡,苗期严重缺乏速效磷供应引起的,现将研究结果总结如下:
In recent years, Dongting Lake plain and its eastern hilly area in our district have a large area of sitting flax leaves after transplanting early rice. Generally occupy 20% to 30% of the area of early rice, rainy even more in low temperature, lake hilly and mountainous areas more serious. For example, 80,000 mu of early rice was sitting in Huarong County in 1980, which severely reduced or even lost early rice, which seriously hindered the improvement of grain output in our region. In order to explore the main reasons for the early rice sitting, we have investigated and analyzed 10,000 hectares of rice fields in Xiangyin County, Yueyang County and Huarong County in 1975, Positioning test, through the comparative analysis of plant soil and fertilizer research shows that the main reason for the early rice sitting plover is soil nutrition and ecological imbalance, a serious shortage of available phosphorus seedling supply, the results are summarized as follows: