(1) Application time. The application time of rice Tongtianbao is closely related to its effect on rice. Spraying time at jointing stage: For early rice (for example, Guangluai No.4, the total number of leaves in the main stem is 13, and the internode elongation is 4, and the effective tillering stage is from turning green to the seedling stage of the ninth leaf), that is, the early stage of the main stem jointing stage (the end of effective tillering), foliar spraying of rice Tongtianbao promotes the development of panicles, coordinates the distribution and transportation of photosynthetic products in rice leaves to young panicles, and reduces the impact of photosynthetic products on young panicles. The effect of spraying universal rice Tongtianbao before 7-leaf stage or after 1 1 leaf stage is not as obvious as that of spraying panicle fertilizer at 9-leaf stage. Mid-season rice (such as Nanjing 1 1, main stem and leaf 15, five elongation internodes, and effective tillering period from turning green to 10 leaf emergence period) is sprayed with universal rice Tongtianbao at the ninth complete leaf emergence stage, that is, the initial stage of main stem jointing (the end of effective tillering); Late rice (such as Hu Xuan 19, main stem and leaf 17, 6 elongated internodes, and effective tillering stage from turning green to leaf emergence 1 1) is in leaf emergence1,that is, the initial stage of main stem jointing (the end of effective tillering). Spraying too early or too late, its effect is not as good as spraying before jointing.
Spraying at filling stage is selected at "full heading stage". Just after the flowering period, the grain enters the rapid filling stage, and the photosynthetic products need to be transported to the grain as soon as possible. During this period, cold damage (cold dew wind) was encountered, and the filling rate was greatly reduced, which had a great impact on yield and quality. Therefore, foliar spraying of universal rice Tongtianbao is beneficial to promote filling, improve filling rate, strengthen filling intensity and increase 1000-grain weight.
(2) dosage. The application dosage of rice Tongtianbao is closely related to its influence on crops. For example, when the application dosage of universal rice Tongtianbao is more than three times the appropriate dosage, although the characteristics of strong roots and strong stems and dwarfing plant height are extremely obvious, it is unreasonable in economy. So it's best to follow the instructions.
Table 4 questionnaire on the growth process of 20 10 (month/day) tons of Tianbao in Heilongjiang Province
Data source: provided by Heilongjiang Agricultural Technology Extension Station.
According to the fertility survey of seven sites, spraying Tongtianbao on rice can accelerate the growth process and promote early maturity. The maturity of Mishan is 2 days earlier than that of the control. The heading date of Wuchang is advanced by 1 day, and the maturity date is advanced by 2 days; Qing 'an expires 2 days in advance; The heading date of glutinous rice balls is 2 days earlier and the maturity date is 3 days earlier. The heading date in Longjiang is 3 days earlier and the maturity is 2 days earlier. The maturity of Baoqing is 3 ~ 7 days earlier; The heading date in Suibin is 2 days earlier and the maturity is 3 days earlier.