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许多作物,当生长发育到一定阶段时进行打顶(摘心),就能够达到增产增收的目的。1.大豆打顶。对无限结荚习性的品种,即蔓生型品种在盛花期进行打顶,不仅可控制徒长,而且可增花保英,一般可增产7%以上。2.甘薯摘心。当秧蔓长到30厘米以上时,摘去1～1.5厘米长的顶心;当分枝蔓长到30厘米以上时,再用同样的方法摘去分枝蔓的顶心(长势差的田块可以不摘心,也可以只摘一次心),一般可增产10%以上。
Many crops, when the growth and development to a certain stage topping (topping), we can achieve the purpose of increasing production and income. Soybean topping. The unlimited pod habit varieties, that is, invasive varieties in full flowering stage topping, not only can control leggy, but also to spend flowers and Britain, the general increase of more than 7%. 2. Sweet potatoes topping. When the seedlings grow to more than 30 cm, pick 1 to 1.5 cm long top of the heart; when the branch grows to more than 30 cm, and then use the same method to pick the top of the branch vine (heart bad field may not Topping, you can also pick only one heart), generally increase production of more than 10%.