提高产量和品质目前人们主要是从品种改良和增施磷、钾及微量元素、选择适当刈割期等方面入手。
Presently, variety improvement, increment in P, K and microelement and selection on suitable cutting period are main methods to improve yield and quality.
在城西闸闸室稳定设计中，利用公路桥桥面适当填土来调整闸室的重心位置，并增做刺墙以减小空箱岸墙的墙后受荷宽度。
Such methods include that filling earth in the traffic bridge to change the position of gravitative centre of sluice chamber, and adding insertwalls to reduce the wall pressure of boxshaped wall.
应用以抗病品种为主、增施钾肥、适期晚播、适当稀植等农业栽培综合防治措施。
High K fertilizer application could increase the resistance of corn and decrease the disease incidence.
应用以抗病品种为主、增施钾肥、适期晚播、适当稀植等农业栽培综合防治措施。
High K fertilizer application could increase the resistance of corn and decrease the disease incidence.
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