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一、壮苗指标及其确定依据1.壮苗指标研究和生产实践表明,小麦冬前苗情壮弱的标准,应以主茎叶龄为主,并根据叶蘖同伸关系应达到的茎蘖数,合理长势长相的有关形态、生理等指标来综合衡量。根据几年系统观察结果,淮北地区小麦冬前壮苗指标如表1。2.壮苗指标确定的依据连续四年试验结果表明:在相同肥力水平条件下,同一品种每年的产量均与越冬叶龄有显著或极显著的正相关关系(叶龄范围3.0—8.2)。即在一定越冬叶龄范围内,产量随越冬叶
I. Strong seedling index and basis for its identification 1. Strong seedling index research and production practices show that the standard of seedling weakness before winter wheat should be dominated by the main stem and leaf age, Tiller number, a reasonable growth of the relevant morphological appearance, physiology and other indicators to comprehensively measure. According to the results of several years of systematic observation, the index of strong seedlings of winter wheat before planting in Huaibei area is shown in Table 1.2. The basis for the determination of strong seedling According to the results of four consecutive years, the results showed that under the same fertility level, Significant or significant significant positive correlation (leaf age range 3.0-8.2). That is, within a certain range of winter leaf age, the yield with the overwintering leaves