| This experiment in field mechanical dry direct seeding and potted live in two ways. Field experiment in mechanical dry direct selection of rice varieties in Liaoning province addressing 2000 rice variety jijing 88 and Jilin province. Test in Cheng Jiao Xiang Xiao Li Tai village, Kaiyuan (42.53°N,124.01°e). Three sowing time (April 15, April 22 and April 29) and three sowing (jijing 88 were 7.2kg/667 square meters and 11.5kg/667 square meters and 17.3kg/667 square meters respectively; addressing the 2000 were 8.6kg/667 square meters and 11.5kg/667 square meters and 14kg/667 square meters respectively), to explore suitable live variety in Liaoning area and its sowing time and seed quantity and different planting modes on growth, morphological and physiological, And yield and its component factors of comparative study, with a view to exploring the formation of Liaoning mechanical dry direct seeding cultivation techniques with high yield model. Potted live test using representative varieties in Northeast China 6:Kat japonica 511,’jijing 88’, addressing the 2000 iron rice 7, wuyoudao 4th and long rice 16. Set five sowing time:April 17, April 25, May 5, May 15 and May 25. Each 3 holes,7 seeds per hole sowing. Aims to explore the variety of characteristics of temperature and photoperiod response, clear similarities and differences in the growth process under different sowing conditions, namely the timing of vegetative and reproductive growth changes, as a reference for direct seeding cultivation and management strategies.Research results showed that:1, With sowing time of postponed, production rendering out first increased Hou declined of changes trend, that performance for April 22 (second period) for sowing of production above April 15 (first period) and April 29 (third period) two period for sowing of production, first period, and second period and third period of emergence time respectively is May 15, and May 21 and May 23, this description is not emergence more early of production on more high, emergence period for May 21 (second period) of processing more for crop of growth development, Yield a more coordinated, so higher yields.2, Due to sowing volume of increased, two a varieties of production basically rendering out first increased Hou declined of changes trend, that performance for JI japonica 88 sowing volume for 11.5kg/667 square meters of production is greater than sowing volume for 7.2kg/667 square meters of production and sowing volume for 17.3kg/667 square meters of production; addressing 2000 sowing volume for 8.6kg/667 square meters of production is greater than sowing volume for 11.5kg/667 square meters of production and sowing volume for 14kg/667 square meters of production; When jijing 88 when the seeding rate is 7.2kg/667 square meters, while the nicely but unavailable tiller led to spike rate is low, making it difficult to achieve high yields; when j ij ing 88 when the seeding rate is 17.3kg/667 square meters, basic seedling over adequate, but because of the growth of population growth, and also not conducive to the formation of high-yielding, and the phenomenon of wasting seed.3. Through the comparison of the actual production of each of the two varieties, addressing the output of 2000 was higher than the output of’jijing 88’, so growth periods was the most appropriate for about 140 days addressing the 2000 mechanical direct seeding culture of rice in Liaoning province.4, Pot planting time of delay were reduced in all growth stages of all varieties, each growing period start time also moved, but not after the time shift, and after panicle differentiation and heading time moves are relatively small. In other words, test 6 varieties of photosensitive resistance, shorten the growth period mainly from the shortening of the vegetative, reproductive nutrition go hand in hand and the reproductive period shortened small. Therefore, direct seeding cultivation of management focus in the preparation, must do everything possible to promote the formation of tiller, make sure generated plenty of spikes. |
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