Rice is prone to lodging and susceptible to weed damage. The following countermeasures should be taken:
Selecting direct-seeded rice varieties for road varieties, besides possessing high-quality, high-yield, and multi-resistance, should also have characteristics such as fertilizer-resistance, dwarfing, and tillering. Early-maturing rice varieties should be selected for early-season rice to avoid the use of live early-maturing varieties to further shorten the growth period, resulting in low yields.
The principle of fertilizing nitrogen-controlled and phosphorus-enhanced potassium direct-seeded rice is “controlling nitrogen and phosphorus and increasing potassiumâ€, “forefoot, central control, and post-supplementationâ€, and the fertilization method should be “one base and three recoveryâ€. Basal fertilizer accounts for 40% of fertilizer and topdressing 60%. Nitrogen fertilizer should be applied to half of base fertilizer and top dressing, and basic phosphorus fertilizer should be applied. It should be emphasized that potassium fertilizer should be applied in the second fertilizer application, and the effect of lodging resistance is more significant.
Leading fields that live in direct rice have more tillers and large groups. They should put their fields on hold early, reduce the number of ineffective deliveries, increase the percentage of spikes, and promote the root system to prevent undergrowth. When the stem shoots in the field reached 80% of the expected number of spikes, the field was put on hold. Due to the shallow distribution of the roots of direct-seeded rice, it is advisable to use multiple light-offs to gradually deepen the root system.
The chemical control was controlled by paclobutrazol at the end of the tillering stage and the early stage of the break in the direct seeding rice, and there was a significant effect of controlling the length and increasing grain weight. In paddy field at the jointing stage of rice, combined with the application of uniconazole and potassium fertilizer, the effect of prevention and control is also obvious.
Controlling weeds is the key to high yield of direct-seeded rice. We must adhere to the principle of "apart from early, small, except."
Before weeding, more weedy and larger plots, with 10% glyphosate 1 kg per 667 square meters, 7 days to 10 days before sowing, sunny days when the field is dry, add 50 kilograms of water for spraying; or 7 days before sowing, after filling the field, fill the water with a depth of about 3.3 cm, and then apply water with 60% butachlor 100 ml per 667 square meters.
On the day of sowing and sowing till the third day, use 17.2% of pups' wettable powder 200g per 667 square meters to spray water, or 3 days to 5 days after sowing, 30% of fluorid EC 100ml for every 667 square meters, evenly Spraying. In fields where there are many broad-leaved weeds from the seedlings of five-leaf rice till the end of the tillage stage, field water should be drained, and then sprayed with 20% dimethyltetrachlorochloride 200ml water and 50kg per 677 square meters. Irrigate 4 cm to 5 cm every other day and let it dry naturally for 7 days to 10 days. Http://
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