boot stage

• 孕穗期

boot stage的用法和样例：

例句

1. At earing stage P-resistant genotypes, compared to P-sensitive ones, have higher accumulation of Pin upper leaves.
   孕穗期，玉米自交系耐低磷特性主要体现在上部叶磷累积量较高，能保证玉米后期正常生长发育。