Planting of Ophiopogon japonicus
Generally, from mid-April to early May every year, choose cloudy days for planting. Ditch planting and hole planting are usually used. Trench planting according to row spacing of 15 cm, ditch depth of 5 cm, first apply thin pig manure water in the ditch, and then plant seedlings according to plant spacing of 6 cm to 8 cm, 3 plants per clump, compacted with soil after planting, so that the seedlings stand upright and firm, so that the seedlings are straight. In some areas, ditches were planted at a depth of 5 cm to 6 cm on the border surface according to a row spacing of about 20 cm, and 1 to 2 seedlings were planted at a spacing of 15 cm in the ditch, and then compacted with soil cover. 700 kg of seedlings are used for every 667 square meters.
When planting holes, the holes were opened according to row spacing of 25 cm, plant spacing of 15 cm and depth of 3 cm to 5 cm. 910 seedlings were planted in each hole. After planting, cover the base of the seedling with soil and compact it, and then drench the root water after planting, 500 kg of seedlings for every 667 square meters.
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High-quality japonica rice varieties: which varieties of japonica rice are good and is japonica rice hybrid rice?
The author recently learned from the Bokun Agricultural Research Institute in Yixing City, Jiangsu Province that the "breeding of new japonica rice varieties with multi-resistance, high yield and high quality" carried out by the institute in cooperation with the National Rice improvement Center of the China Rice Research Institute has made a breakthrough. 4701, 4714 and other new high-yield and high-quality japonica rice lines resistant to brown planthopper, rice blast and other diseases and insect pests were successfully bred. It is reported that the new japonica rice lines with high yield and high quality have aggregated genes for resistance to brown planthopper, white-backed planthopper, rice blast and stripe blight, as well as high yield and high quality.
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Occurrence and control of rice water weevil
Rice water weevil is an international agricultural plant quarantine pest, which first occurred in America and in Asia, such as Japan, South Korea, North Korea and so on. The rice water weevil was first found in China in 1987 in Tanghai County, Hebei Province. The rice water weevil was first found in Ji'an City, Tonghua District in August 1993. At present, this kind of pest occurs to varying degrees in most areas of Heilongjiang Province. I. the harm degree of rice water weevil the rice water weevil is mainly harmful to rice, but also to the Ministry of Rice.
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