蛋白质含量最低值和产量最高值之间对应的施氮量为产量和 蛋白质含量在土壤水分含量为田间最大持水量的50%和60%条件下协同变化的施氮量区间。
The nitrogen between minimum protein content and maximum yield were the nitrogen of coordinated variation of yield and grain protein content in 50% or 60% of soil water content.
土壤含水量达最大田间持水量的5 2 %以上时，才有较大的生物量；
When water content in soil is above 52%, larger biomass could occur.
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