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春季低温干旱,对种子发芽出苗影响较大,加之各地所用品种复杂多样,种子质量不一以及地下害虫的危害等,使某些玉米地块出现炕种、粉种、芽干、冻伤等情况,造成缺苗断条,必须及时搞好“五查”和补救。首先要搞好“五查”。即播种后3～5天查墒,10天左右查种,15天左右查芽,25天左右查苗,在以上四查的同时要查虫情。具体查法:一般在一块责任田上按对角线取5个点,每点取1平方米(65厘米垄宽取1.54米长一段垄),将取点的一段垄扒开进行检查。查种查芽时要分别查出炕种、粉种、芽干、冻伤等的粒数及每点总粒数,各点坏
Low temperature and drought in spring have a great impact on seed germination and emergence. In addition, complicated and diverse varieties used in different places, different seed quality and harm of underground pests etc. make certain corn plots appear kang species, powder types, buds dry, frostbite and so on, Caused by lack of seedlings broken bar, we must promptly do a good job, “five check” and remedy. First of all to do a good job, “five investigation.” Sowing 3 to 5 days after sowing moisture, 10 days or so, 15 days to find buds, 25 days or so looking up seedlings, in the above four checks at the same time to check the worm. Specific investigation: Generally in a field of responsibility diagonally take 5 points, each point of 1 square meter (65 cm ridge to take a length of 1.54 m long ridge), will take some of the ridge 扒 for inspection. Check the seed germination should be detected when the kang species, powder, dry bud, frostbite and other particles and the total number of particles per point, the point of bad