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为了促进越冬油菜早发壮苗,要在施足底肥、培育壮苗、及时移栽的基础上,重点采取以下措施:一、间苗定苗要求早间苗,稀定苗。掌握的原则是间密留稀,去弱留壮,调整株间距离,保持均匀。一般分两次间苗,第一次在齐苗后出现第一片真叶时进行,间到叶不搭叶;第二次间苗在第二片真叶出现时进行。三叶期进行定苗,留苗密度根据油菜播种早迟、秧龄长短和秧苗生长状况而定,一般保持苗距7—10厘米。每亩基本苗掌握在1.2—
In order to promote winter seedlings early seedlings, in the application of sufficient base fertilizer, nurturing strong seedlings, timely transplanting on the basis of focusing on the following measures: First, the seedlings Dingmiao requirements early seedlings, dilute Dingmiao. Grasp the principle of thinning dilute, weak to stay strong, adjust the distance between strains, to maintain uniformity. Generally divided into two Miao, the first time in Qi Miao appear when the first true leaves, between the leaves do not take leaves; the second Miao in the second true leaves appear. Trefoil stage Dingmiao, Liao Miao density according to rapeseed planting sooner or later, the seedling age and seedling growth conditions may be, the general maintenance of seedling spacing 7-10 cm. Basic seedlings per acre in the 1.2-