Brief Introduction to the Rice Variety 9 You 418 (formerly known as 9a/418)

Variety source: 920lAxC418.

Characteristics: A three-line japonica hybrid rice combination. Plant height 120-125 cm, total leaf number on the main stem 18, elongated internodes above ground 6, plants slender and upright, leaves held erect, leaf color relatively dark, tillering ability above medium, productive tiller rate about 70%, after heading the angle between the flag leaf and the culm is 10.4 degrees, productive tillers per plant 8-10, panicle length 25 cm, grains per panicle 170-190, seed setting rate 80%-85%, 1000-grain weight 26-27 g, easy to thresh. Panicle layer uniform, panicles borne below the leaves, culms highly elastic, grains yellow, pubescence medium. Head rice rate 61.4%, chalkiness 21.7%, amylose content 16.5%. Whole growth period 150-155 days, growth duration moderate. High yield potential. Good yield stability, relatively wide adaptability. Moderately resistant to rice blast, rice quality below medium. In 1998 it was entered in the national northern rice region trial in the maturity group of Yujing 6, with an average yield of 614.3 kg per mu, 8.6% higher than the control Yujing 6; in the 1999 continued trial, the average yield was 629.8 kg per mu, 10.6% higher than the control Yujing 6; in the 1999 production trial the average yield was 637.7 kg per mu, 10.6% higher than the control Yujing 6.

Cultivation points: Plant early at the proper time; sow in late April in northern Huai and early May in southern Huai, seeding rate in the seedling bed 10-15 kg/mu, and strive to transplant early in early to mid-June. Transplanting density: row spacing 23-26 cm, plant spacing 10-13.2 cm, basic seedlings 80,000-100,000. To produce 700 kg of paddy per mu, the total nitrogen application rate should be about 18-20 kg, with the ratio of basal fertilizer, tillering fertilizer and panicle-grain fertilizer preferably 5:3:2; basal fertilizer should be mainly organic fertilizer, appropriately supplemented with phosphorus and potassium fertilizer; apply tillering fertilizer early and heavily; panicle fertilizer should focus on flower-preserving fertilizer; during the grain-filling stage use intermittent irrigation, with the previous water not visible before the next water is applied, and do not cut off water too early in the late stage. Soak seeds with chemicals before sowing to prevent bakanae disease, and at the same time, according to disease and pest forecasts, prevent and control diseases and pests promptly.

Suitable range: Southern Shandong and northern Huai region.