Rice hybrid plant intercropping is a cultivation technique that makes full use of the space-time advantage formed by the difference of growth period and plant height between hybrid rice and japonica rice variety. Practice has proved that rice chowed intercropping can not only make full use of light and temperature resources, but also increase the output per unit area, increase the yield of hybrid rice, save land, increase the yield of 30-50 kg of japonica rice, and reduce the serious rice blast disease in japonica rice. The ills of easy lodging. It not only increased the income of farmers, but also promoted the structural adjustment of varieties, and the economic and social benefits were very significant, which was welcomed and accepted by farmers.
1. Variety selection and matching. The selection is based on genetic differences, disease resistance, agronomic traits and economic traits of rice varieties. The main hybrid rice varieties were selected from medium-late mature varieties (combination) such as Gangyou 906, II You 906, Jinyou 188 and B You 827, and the intercropped varieties of japonica rice were selected from the mature stage with a height of 15-20 cm higher than that of the main hybrid rice. Such as "Xinmin", Chengyu 24 and so on.
2, take dry breeding, cultivate strong. Hybrid rice and japonica rice were planted at the same time, and they were transplanted simultaneously. Grab the high-yield sowing date and plant it from March 28th to April 1st.
3, reasonable planting, to ensure density. The main hybrid rice is cultivated by wide and narrow rows or thrown. The width and narrow row planting specifications are (5+9)×5 inches, and each nest is planted with 6-8 seedlings; The intercropped variety japonica rice is planted in the middle of the wide row with hybrid rice every 6-8 rows, and the nest is 1.5 feet, and 8-9 seedlings are planted in each nest. In principle, the japonica rice does not occupy the row spacing alone. The surrounding area is well sealed, and about 0.5 kg of japonica rice seeds are used in the mu, and 1200-1500 nests of japonica rice are planted per acre. The number of indica rice in the field of transplanting plants is controlled within 10%.
4, reasonable fertilization, heavy bottom early chase. The base fertilizer is 40-50% of the ternary compound fertilizer with a nutrient content of 25% or 30-35 kg of ammonium bicarbonate, 30-50 kg of superphosphate, 8-10 kg of potassium chloride, and 20-30 kg of pig manure. Topdressing applied 15 kg of ammonium bicarbonate and 20 to 30 tons of pig manure water in 7 days after planting. Before the heading, apply 2 to 3 kg of urea.
5, scientific management of water. Adhere to the scientific water management method of “shallow water planting, water-returning green, thin water sputum, timely sun-dried field, moist stalk, water-fostering, foot-watering, moist grouting, dry-wet seed, yellow ripeningâ€.
6, comprehensive prevention of pests and diseases. When transplanting, use 20% "tricyclazole" 750 times liquid to soak the seedlings, then pile up for half an hour and transplant again to prevent rice blast. Timely application of pesticides to control pests such as stem borer, armyworm, rice borer, sheath blight, rice blast.
7, timely harvest, single-handed singles. The main hybrid rice and the intercropped japonica rice were harvested in singles and harvested at the right time. After the indica rice is matured, the method of cutting the ear is firstly harvested. When harvesting the japonica rice, it is necessary to avoid artificially losing the hybrid rice, and strive to achieve fine harvesting and grain returning.
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