论文部分内容阅读
玉米是需肥量较大的作物,科学促肥,能满足其不同生育阶段对各种营养元素的需要,是促早熟、夺高产的重要措施。根据长春地区的气候特点,种子田易受早春低温和秋季早霜危害。1992年由于早春气温低,推迟了玉米生长发育,在各生长发育阶段又没采取有力措施,因而大部分种子田受害,影响了种子正常成熟,发芽率普遍降低。据气象
Corn is the need for larger amount of fertilizer crops, science and fattening, to meet the different stages of its growth on the needs of various nutrients, is to promote early maturity, an important measure to win high yield. According to Changchun climate characteristics, seed fields vulnerable to early spring low temperature and early autumn frost damage. Due to the low temperature in early spring in 1992, postponed the growth and development of maize, and did not take any effective measures in each stage of growth and development. Therefore, the damage of most seed fields affected the normal maturation of seeds and the germination rate generally dropped. According to the weather