A cotton variety has certain requirements for accumulated temperature in a certain area, and has relative stability. The accumulative temperature meter is used to monitor the accumulative temperature in this area so as to obtain the accumulated temperature range required by the variety, combined with the local average temperature change over the years, ie Can be applied in cotton production soil. 1. Use effective accumulated temperature to predict cotton growth period. According to the effective accumulated temperature required for a certain development period of a certain species and the local long-term weather forecast, it is possible to predict the development period of the species and reasonably arrange farm work. The common formula is: In the formula, D is the forecast development date, D is the previous development date, A is the effective accumulated temperature in a developmental period, (ie, A-Et-Bn), B is the biological minimum temperature, and t is the forecast daily average temperature. Example: There are two varieties of red dragonfly and Minuphyn to be paired and seeded in order to use their heterosis. If Rumirunu decides the persimmon species on April 10th, when should the two flower varieties shift their flowering dates? Fear species? From 2 we can see that the effective accumulated temperature of Minufi from persimmon species to flowering needs to be greater than I2°C is 64.0 to 394.9+750.6=, 209.5C, and that of red dragonfly is 55.0+555.5+389.5 to 1,000, according to the local 5 and 6 months. The average daily temperature of the long-term weather forecast is 23.8, and the formula can be used to predict the flowering period of minuplant firstly, and then the seeding period of the plant is predicted based on the flowering period of Minupha. Millufei's flowering period is measured as follows: 2. Identify the planting areas of cotton varieties and varieties with accumulated temperature. Cotton is a thermophilic crop that requires sufficient thermal heterogeneity to accumulate. According to our identification results, upland cotton ear maturation requires a daily accumulated temperature of 2,800-3,000} greater than the average daily temperature from seeding to the opening of the boll. The medium-maturing species is 3,400-3, G00}, and the islands-cotton is 3,800-4,100Co. It takes more than two months to pull stalks, so the total accumulated temperature required for the whole growing period will increase. The active accumulated temperature of Xinzhou County in the past two months of September and October of 12 and above is 1232°. Therefore, the accumulated accumulated temperature of 4,600°C can be tested to determine whether the medium-grown upland cotton can be used, or the active accumulated temperature of 5,000°C can be used to identify the type of island-inert cotton. According to the data from the Hubei Bureau of Meteorology, we have calculated that the cumulative accumulated temperature of all cotton producing areas during April-October is not more than 5,000, indicating that all cotton producing areas in Hubei are not suitable for planting existing varieties of island cotton. Here, it should be pointed out that only a factor of accumulated temperature is used to identify cotton planting areas, and there are sometimes tablets. For example, the activity accumulated temperature in Enshi and Yichang counties from April to October is greater than 12°C, which is more than 4,600°C. It seems that there is no problem in the cultivation of upland cotton. However, it has been proved that Enshi and Yichang (except for bungalows along the river) cannot only plant medium-grown varieties in upland cotton, and even early maturing species cannot grow. This is because the rains in the cotton growing season in these two counties are prone to excessive rainfall and the lack of sunshine is extremely detrimental to the growth and development of cotton. It can be seen that all meteorological factors have a certain effect on the growth and development of cotton, and thermal heterogeneity is only one of the important factors. Therefore, besides accumulating temperature indicators, jujube, sunshine, frost-free period, and cultivation techniques should also be taken into consideration as supplementary indicators in the identification of J or cultivars. 3. Accumulation of temperature after watching live wheat continuous cropping cotton. Jianghanping’s state-owned farms in our province have carried out trials of harvesting wheat after harvest, and obtained good results in order to seize the high yield of both grain and cotton and adapt to the requirements of cotton field mechanization. From the point of view of the accumulated temperature required by cotton, the reform of this “set and reorganization†cultivation system has a promising future. After two years of appraisal in our hospital, the wheat planted in late May can be used as cotton. Generally, the boll opening can begin in mid-September. The growth period is 109---110 days, and the accumulated temperature required from sowing to boll opening is 2,911.9-2,922.9C. From the time of boll opening to hauling, one and a half months are still needed. This time, the accumulated temperature of 900C is still needed. Therefore, the accumulated temperature of wheat after sowing from the sowing to the whole stalk growth period is more than 3,800C. The accumulated accumulated temperature of Hubei Dadao cotton production area during the G-10 month is generally around 3,700°C. It cannot fully meet the heat required for continuous wheat production after wheat. Therefore, the continuous production of wheat after wheat is bound to have certain tasks. Peel the peach. For example, in Hubei Agricultural Research Institute in 1975, six middle-early-maturing cotton varieties were used as a result of the Houlianlian community experiment. Under the climate conditions of Wuchang in the current year, 90% of flowers were collected at the end of October. According to the two-year fixed plant survey conducted by our institute, after the wheat was broadcasted as a high-density (10,000 plants per plant) cotton, budding began in early July, budding ended at the end of the month, and flowering began in early August. Flowering at the end of the month was delayed by one month compared with the general interplanting cotton development. about. The identification of the development of cotton buds in the Territory requires a temperature of about 7000C, and the development of the bell needs to be about 1,300-1,400C. It can be seen from Fig. 5 that the accumulated temperature of the main cotton production areas in the province in July and August is greater than 800C. The buds of the month can all flower in August, but the flowers in August do not necessarily turn out at the end of October. Because the accumulated temperature of the two months of September and October are all around 1,200°C, it is not possible to meet the P-point boll development at the end of August. The heat needed is different. It can be seen that the continuous accumulated temperature of wheat after live broadcasting is calculated from the accumulated temperature required for the development of buds and bolls. There should also be a knife to divide the peach blossoms. The Department of Agriculture of the Chinese Academy of Sciences continued to broadcast the cotton test for wheat in 1975. On October 31st, the stalks were extracted. The peach blossoms vary greatly depending on the type of cotton. Huamian 7 is 8.1, Jiangsu Cotton 3 is 15.40o, and Uganda 3 No. 65.500, indicating that after the wheat live continuous cropping cotton to use a shorter growth period (preferably 110 days or less) of the species, or peeling peaches increased, the shape of the ring fiber quality. Beeswax Church Candles,Decorative Candles For Church Prayer,Dripless Church Candles,Traditional Church Candles Shijiazhuang Tabo Candles Sales Co., Ltd. , https://www.tabocandles.com
Application of accumulated temperature in cotton production