论文部分内容阅读
1.间苗定苗.蓖麻幼苗长出两片真叶就要及时疏苗,待长出3～4片真叶时,每穴留两株壮苗。5～6片真叶时,结合中耕除草进行定苗,每穴留1株。如果地块没有地下害虫,3～4叶期即可定苗。在间苗、定苗的同时,要对缺株断垄处进行移苗补栽。2.中耕追肥.蓖麻播种至出苗时间较长,又因蓖麻株行距较宽,易滋生杂草,当苗高3寸左右(3～4片叶)时,结合间苗进行第一次中耕除草。苗高6寸(5～6片叶)时,进行第二次中耕除草。中耕前先定苗、施肥。第三次中耕应在蓖麻开花前进行。由于蓖麻的花期较长,要结合第三次中耕追施第二次肥,以促进中后期花的结实与成熟。蓖麻植株高大,枝叶繁茂,但其支根较弱,要在第
1. Miao Dingmiao. Castor seedlings grow two true leaves timely sparse seedlings to be grown 3 to 4 true leaves, leaving two strong seedlings per hole. 5 to 6 true leaves, combined with cultivating weed Dingmiao, leaving 1 per hole. If there is no underground pests, 3 to 4 leaf stage can be given seedlings. In the Miao Miao, Dingmiao at the same time, to cut off the missing branches Miao Miao replanting. 2. Cultivation topdressing .Corch sowing to the emergence of a longer time, and castor line spacing wide, easy to breed weeds, when the seedling height of about 3 inches (3 to 4 leaves), combined with saplings for the first time weeding. Seedling height 6 inches (5 to 6 leaves), the second cultivator weeding. Prior to cultivating Dingmiao, fertilization. The third cultivation should be carried out before castor blossom. Due to the relatively long flowering period of castor, it is necessary to combine the second fertilizer with the third crop cultivation to promote the fruiting and ripening of flowers in the middle and late stages. Castor plant tall, lush foliage, but its weaker roots, to be in the first