Too high or too low fertilization level doesn't benefit the increase biological yield, economic yield and amount of dry matter.
高肥和低肥均不利于单株生物产量、干物质积累总量和经济产量的增加，高肥的抑制作用更明显。
2
Lowlevel nitrogen fertilizer maked the yieldof strawberry fruit to decline, but it maked the single fruit weigh to improve greatly, and improve the ratio of commodity fruit significantly.
低量氮肥处理虽然产量较低，但大大提高了单果重，明显增加了草莓果实的商品果率。
3
The method can provide a crystal of the compound with a high purity and a high yield while the content of 2s isomer is kept at a lowlevel.