In recent years, due to the unpredictable changes in weather and climate and the increase in severe weather and irregular patterns, the risk factors for double-season rice cultivation have increased, and the scientific and rational combination of early and late rice varieties is the key.
Variety mix
1. Mature with the principle. According to the geographical and climatic conditions, the seasonal contradictions of planting double cropping rice are more prominent, and there are few selective varieties for early and late rice varieties. The modes applicable to the combination of early and late rice varieties are only early maturing and early rice varieties with medium late late rice varieties (105 days cooked With the 120-day ripening period, the mid-maturing early-season rice varieties with the mid-late hybrid rice varieties (110-day ripening period and 115-day ripening period) can ensure both stable and high yields for the early and late-season double-season planting.
2. Quality matching principles. In order to highlight green, high-yield, and high-efficiency targets, the “early-ultrasonic and late-optimal†planting model was adopted in areas where double-cropping rice was planted, ie, super rice planted in early rice and high-quality rice planted in late rice.
Variety selection
Screening suitable for planting early and late rice varieties is the basis for stable production and high yield of double-season rice planting. After many years of introduction and demonstration, the suitable early rice varieties to be planted include: Xiangzaojing No. 6 (early morning of 87) and middle early 39, Wen 814, Xiangzaoyun No. 45, Xiangzaoyu No. 32, Zhongjiao No. 17, Tanliangyou 83, Tanliangyou 143, etc.; late rice cultivars Tao Youzhanzhan, Xiangwanyi No. 13 and Yueyou 9113 , Tianyou Huazhan, Yueyou 518 and so on.
Sowing time
According to climatic conditions, early rice is suitable for sowing according to weather conditions in late March (seeds coated with dry-nourished nanny can be planted about 7 days in advance); late rice variety No. 13 in late-season rice should be planted on June 8-10; The Yuxiang hybrids were planted on June 15-18, and the Yueyou 518 mature varieties were planted on June 20th.
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