Effect of sowing time on n, P, K and the nutrientaccumulation of sweet corn seed.
不同播期对甜玉米籽粒n, p, K及可溶性糖的积累的影响研究。
2
The standing nutrientaccumulation in whole stand increased with the increase of density.
林分营养元素积累量随林分密度的增加而增加；
3
Different varieties, even growing at the same field, behave differently in nutrient uptake, dry-matter accumulation, result finally in different yield and economic income.