With the development of modern agriculture and the transfer of labor force, the late rice cultivation technology as a simple cultivation has been rapidly developed. Ziyang District, the area of ​​late rice throwing in 2010 reached more than 50%. However, in the popularization and application of late rice throwing technology, the authors saw that some farmers blindly selected late-maturing varieties of late rice. In order not to exceed the age, they blindly postponed the sowing period. For example, “Hunan Candian No. 12†was postponed until June 25th. On the 26th, individual sowing was delayed till the end of June; “Huang Huazhan†was postponed until June 13th to 15th, and some individuals were sowed as late as June 18. Due to delayed sowing, heading was significantly delayed, and it was not safe to reduce panicle production. In order to do a good job in the late-day rice dumplings, we must put the following “four levels†into practice.
1. The selection of good varieties for late rice varieties should be based on the sooner or later of early rice maturity. Early maturing varieties of early rice should use medium-maturity or late-maturity varieties with a longer growing period of late rice. Late maturing medium-maturing varieties with late-maturing rice should use early-maturing or early-maturing varieties with a short growing period. Late-maturing late-maturing varieties of late rice are not suitable for late-season rice varieties for casting cultivation; late-maturing late rice varieties are generally not suitable for late rice throwing cultivation.
2. Use good seeding for good seeding. For every 667 square meters of seedlings thrown in late rice, the amount of seeds used in the field is higher than the amount of seeds used for hand transplanting. To guarantee the high yield of late rice throwing, the seed amount per 667 square meters for field use: hybrid rice should meet 2.25 kg to 2.75 kg, and conventional rice should meet 4 kg to 4.5 kg (shorter fertility period, and vice versa). The second is the number of orders. In practice, it is known that the number of Datian rakes per 667 square meters must satisfy (about 308 holes) 110 or so. This will not only increase the elasticity of age, but also guarantee the density of throwing planting and lay a foundation for high yields. The third is the sowing date. The seeding period for late rice throwing must be considered both during the maturing period of early rice and the safety of the late rice. The suitable sowing date for the early rice late-maturing varieties is generally from June 25th to 28th, and the medium-maturing varieties are from June 20th to 24th. Do not blindly postpone the sowing period to prevent the earing from delaying the occurrence of chilling injury and reducing the yield.
3. Put the management of Guantian to do a good job in controlling water, removing mites, controlling seedlings, pest control and so on. One is to manage water well. Late rice thrown into the hot season after sowing, so after sowing, we must ensure that the disk no water, but also ensure that the disk is wet, usually full of water, after the first leaf stage as long as the surface moisture can be. The second is to remove good grass. The third is chemical regulation. Seedlings 1 leaf 1 heart period, every 667 square meters of Putian use "paclobutrazol" 150 grams to 200 grams (a small short-lived should be less, and vice versa should be more) 30 kg of water evenly sprayed on the seedlings; four is based on local pest information in time Prevention.
4. To throw a good throwing plant late rice throwing seedlings due to the sowing density, seedlings are dense, so the age limit is limited, the younger age flexibility. In terms of age, early maturing rice varieties should be no more than 20 days, and no more than 23 days at the latest; medium maturing varieties should be no more than 25 days, and no more than 28 days at the latest. In terms of throwing time, it is better not to exceed July 20th, but not later than July 23rd. Otherwise, it is prone to early emergence, early ear failure, and failure to achieve full head yield and reduce production.
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