Characteristics and cultivation techniques of 29 you 559, a new high-yielding hybrid rice combination

29 you 559 is a new indica three-line hybrid rice combination bred by Jiangsu Xuzhou Biological Engineering higher Vocational School and Jiangsu Coastal Agricultural Science Institute with self-breeding male sterile line 29A and self-breeding restorer line Yanhui 559. 29A is the first indica three-line male sterile line bred in Jiangsu. The new combination 29 you 559 bred with 29A and Yanhui 559 had obvious heterosis and passed the crop variety approval in Jiangsu Province in January 2003. Heterosis of Zhong 29 you 559

In 1999, participated in the joint identification experiment of hybrid indica rice in Jiangsu Province, the average unit yield was 9.35t/ ha, 13.37% higher than that of Shanyou 63 (extremely significant), ranking first among 11 combinations tested. In 2001, participated in the regional trial of hybrid indica rice in Jiangsu Province, the average unit yield was 9.96t/ ha, which was 10.54% higher than that of Shanyou 63 (extremely significant), ranking first, while in 2002, the average yield per hectare was 10.26t/ ha, 12.26% higher than that of Shanyou 63 (extremely significant). In the regional trials of Jiangsu Province in 2001 and 2002, the average yield per unit area was 10.11t/ ha, which was 11.41% higher than that of Shanyou 63 (extremely significant), ranking first. Its absolute yield level was the highest in Jiangsu Province. In 2002, while participating in the provincial and regional trial, an exception was made to enter the hybrid indica production experiment in Jiangsu Province, with an average yield of 9.42t/ ha, 10% higher than that of Shanyou 63.

Characteristics of 229 you 559

The seedlings of 29 you 559 were short and stout, with short and stiff leaves, purple leaf sheath and dark leaf color, moderate distribution of adult plant type, about 120cm in plant height, 18-19 leaves in total leaves of main stem, 5 elongated internodes, medium tillering ability and high panicle rate. In general, the effective panicle is about 2.4 million per hectare, the panicle rate is 65%, the panicle length is 24.5cm, the panicle type is larger, the total grain per panicle is 170,180 grains, about 160grains per panicle, the seed setting rate is about 90 per cent, the 1000-grain weight is 29030g, and the grain is yellow and full, without awn. The whole growth period is about 145 days, which is 3 or 4 days later than that of Shanyou 63.

According to the inoculation identification of Plant Protection Institute of Jiangsu Academy of Agricultural Sciences, five physiological races B5, medium C13, medium D1, medium E3 and medium C1 were resistant to rice blast, the reaction level was 0, neck blast was resistant, reaction level was 1, resistance to bacterial blight JS49-6 and PX079 was grade 3, and the ratio of spot extension length to corresponding plant height was 0.298. According to the test of rice quality supervision, inspection and testing center of the Ministry of Agriculture, brown rice rate is 80.8%, milled rice rate is 74.0%, head rice rate is 58.8%, grain length 6.2mm is 2.4%, chalkiness rate is 79%, chalkiness is 11.8%, transparency is grade 2, alkali elimination value is 4.6, gel consistency 88mm, amylose content is 22.4%, protein content is 8.5%. According to the NY1222~86 "Standard for High quality Edible Rice" of the Ministry of Agriculture, among the 12 indexes mentioned above, except for chalkiness rate and chalkiness degree, 10 indexes reached the standard of high quality rice.

High-yielding cultivation techniques of 329 you 559

29 you 559 is a panicle heavy variety. The suitable panicle-grain structure for per unit yield of 9.75t/ ha is 225-2.4 million per hectare, with more than 170grains per panicle, seed setting rate of about 90%, and 1000-grain weight of 29g / ha. The high-yield cultivation strategy is to focus on large panicles and improve the seed setting rate on the basis of striving for full ears. The cultivation should be regulated around the principle of "promoting early seedling and laying the foundation of full ear, strong stalk and healthy plant in the middle stage, promoting the formation of large ear, raising root and protecting leaves in the later stage, increasing seed setting rate and increasing grain weight". The following points should be paid attention to in terms of specific measures:

3.1 the suitable time for early sowing and the cultivation of strong seedlings 29 you 559 was planted as middle rice after wheat stubble in Jiangsu Province, and the best sowing time was from the end of April to the first ten days of May. The sowing amount of seedling field is 225kg/ hectare for water raising, 300kg/ hectare for dry raising, and 18.0~22.5kg/ hectare for field use. The seedling field should apply sufficient basic fertilizer, early weaning fertilizer, suitable to promote tiller fertilizer, skillfully apply marriage fertilizer, in order to cultivate strong seedlings of suitable age for multiple tillers (seedling age about 35 days).

The planting density is 270000 holes per hectare, and the basic seedlings are 105 ~ 1.2 million per hectare.

The total fertilizer requirement of Honda is equivalent to pure nitrogen 300kg/ hectare, and the ratio of basal fertilizer, tiller fertilizer and panicle fertilizer should be 4 ∶ 3 ∶ 3. Water slurry management should adopt the method of "planting in shallow water, living trees in an inch of water, tillering in thin water, water retention, heading and flowering, and alternating dry and wet grouting". When the total tillering seedlings per mu reached equal panicle seedlings, drained and shelved the field, the peak seedlings were controlled not more than 3.75 million / ha, and the final panicle was 225 ~ 2.4 million / ha.

3.4 Control of diseases and insect pests, and pay attention to the prevention and control of rice thrips, borer, sheath blight and other diseases and insect pests during the period of seedling protection and panicle growth, so as to ensure the normal growth of rice seedlings.