Spring corn double film covering cultivation technique

The main cultivation measures are as follows: (1) Land preparation and fertilization should choose sunny, ventilated, deep, loose, fertile, well-watered and well-drained plots. Basal fertilizers should be dominated by organic fertilizers. The sooner and better the combination of turning and ploughing in autumn, can fully decompose the fertilizer and dissolve the soil. According to the experiment, the use of basal fertiliser in the autumn is 14.9% higher than that of the spring basal fertilizer. (2) The selection of improved varieties should be suitable for selecting the variety with a short growing period, such as Dandan No. 4 and Denghai No. 1. It is suitable for the varieties after spring sowing in our city. (C) sun seed germination Shai sun seeds can promote after-ripening, sowing 2d before sowing, can increase the germination rate of 13% -28%, early emergence of 1-2d. (4) The first layer of double-film nursery is to sow the film, and the film is directly applied to the sowing ridge; the second layer is a large arch shed. Double film coverage, mainly warming and moisturizing. Practice has proved that this is the main measure to resist rainy weather. Observed 5-6 days after sowing, double-film nursery than single-film nursery, the emergence rate of 8.93% higher. Seeding film: flattened ridges before coating, uniformly spraying herbicide corn treasure, Yutian net and so on. As the underground pest activity began to rampant in spring, it is best to use seed phosphorus for seed dressing before sowing. Mu species 2.5-3.0kg, sowing, 2 / hole, sowing depth 3-7cm. Broken film induced seedlings: When the top soil emerged, timely rupture membrane seedlings and soil pressure membrane. Low-temperature hardening seedlings: When the emergence of 70%, pay attention to low temperature damage. (five) fertilizer and water management Rational fertilization: due to early sowing of spring corn, low temperatures, soil nutrient conversion is slow, poor root absorption, the fertilizer can easily be attracted to use near the seeds. Shi Zhuang Miao Fei 3-4 leaves; 5 leaves to jointing Shi strong stalk fertilizer; 8-9 leaf fertilizer application. At the same time combined with pest control foliar spray green source 999.481 and other trace element fertilizers. Timely pouring does not: Water should be maintained at about 70% from the jointing stage; after the booting stage is the critical period of corn water requirement, the soil field water holding capacity should be maintained at 70%-80%; corn needs a lot of water from tasselling to milk-mature stage and should always be Keep moist. (VI) Diseases and Insect Pests Spring corn in our city is mainly seeded in the seedling stage, such as the thrips, golden worms, aunts, and crickets. In the past few years, the most serious damage to spring corn in the southwestern Shandong province is the hummer. It eats the heart and leaves of corn seedlings and causes damage to their growing points. As regards wilting, rolling leaf, dwarfing, and not being strong, they can spray corn leaves with water on the seedlings in time. The ear stage is mainly the armyworm, corn borer, stalk rot, etc. It can be sprayed with 600 times faster, with special effects; at the same time, paired carbendazim can prevent diseases caused by stem rot and other bacteria. (7) Timely harvest When the corn matures, it shows that the stalk is yellowing, the yellowish lobe of the loquat leaf is loose, and the grain hardens and shows the inherent color of the variety. Generally, it is harvested when it is ripe.

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