Black rice is a processing product of black rice, belonging to glutinous rice or glutinous rice. Black rice is edible and has high medicinal value. It has the functions of appetizing and benefiting, strengthening the spleen and promoting blood circulation, and improving eyesight. It is known as "black pearl" and "king of the world". The reputation is also an indispensable factor for creative farming in rice fields in Lingchuan County. Next, Xiaobian talks about the purification and rejuvenation experiment of black rice in Lingchuan County in 2017.
1 test material
1.1 Test variety
The variety is conventional black rice, which is provided by the Agricultural Bureau of Nandan County, Hechi City.
1.2 Basic situation of the test field
The experimental field is located in Laohebian Village, Dongtou Village, Tanxia Town, Lingchuan County. The soil is black loam and the former crop is Chinese cabbage.
1.3 Test design and method
1.3.1 Test design
The experiment was routinely planted and managed in the field, and the field seedlings were observed and recorded at different growth stages, and the test was conducted.
1.3.2 Test methods and processes
Planted on June 5, the 353-hole large-hole tray was used to raise the pupa. Each hole had 2-3 grains of grain, and the seeding amount was 4 kg per 667 m 2 to cultivate the strong and strong scorpion. On July 3, transplanting and planting were carried out. When the ploughing land was prepared, 500 kg of farmyard manure was applied per 667 m 2 , 40 kg of 45% compound fertilizer, and 5 kg of urea was used as the base fertilizer. The planting size is 7×5 inches, transplanted per plant, and the field management is strengthened after transplanting. After returning to green, 7.5 kg of urea and potassium fertilizer are applied every 667 m 2 . During the period of growth, the integrated control of pests and pests will be strengthened. Before harvesting, the panicles will be selected according to the panicle type, grain type and panicle color. The dominant panicles will be preserved and re- emerged and expanded in the coming year.
2 test results and analysis
2.1 Test results
Due to the heavy rainstorm on August 14-15 in the Daejeon period, the flooding of the tillers and the young spikes were affected, resulting in ineffective tillers, forming some spikelets and short spikes. Before harvesting, we selected three different heterotypic varieties according to the different grain lengths of the different plants, the darker purple color of the ears, and the harder rice straw wax. The pure rice seeds were 10 kg purified in the field. Used for purification test species in the coming year.
2.2 Test analysis
Table 1 Black rice growth period survey
Table 2 Questionnaire of black rice growth period
From the test results in Table 1 and Table 2, the growth period of the variety is 130 d, the average plant is up to 134 cm, the average ear length is 23.9 cm, the average grain number is 125.5, the average grain size is 105.3, and the seed setting rate is 83.9%. The 1000-grain weight is 22.94 g. In Guilin, which is a region where rice blast and sheath blight are more likely to occur, medium-resistant varieties are worthy of promotion.
3 Test conclusions and discussion
According to the long growth period of the variety, the leaf type is more viscous and the traits are weaker. It is recommended that when seedlings are planted, 3-4 seeds per seed are arranged, and the plant spacing is increased, and planted in the size of 8×5 or 8×6. While ensuring the use of farmyard manure, 50 kg of calcium phosphate is applied as a base fertilizer per 667 m 2 , and the use of nitrogen fertilizer is reduced when fertilizing. The black rice plant is resistant to rice blast and sheath blight, light-spotted neck stalk and rice smut. It is a region where blast and sheath blight are more likely to occur in Guilin, and the medium resistant variety is worthy of popularization, but it is not suitable for the time being. Large-scale promotion of planting.
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