Expore The Reasons Of Mechanical Transplanted Double Season Rice Growth Period Delay

In this experiment, use Zhuliangyou30,Zhongjiazao 17 and H you 518 for the material,study the effect and cause of rice growth period of measures of different planting and machine interpolation, the results are as follows:1. At the different planting seeding transplanting for the same time, the growth period of traditional hand planting is shortest,throwing seedling is shorter, the machine planting seedling hand planting is long, the machine planting seedling transplanting is the longest.Early rice’s dates number of delay is shorter than late rice’s;The interval of stability from heading to maturity stage, transplanting to the young campanile differentiation stage delay days accounted for more than 50% of the whole growth period delay.Seedling quality and degree of injury relate to the growing period change of the plant of different planting patterns, For artificial transplanting, above ground dry matter weight compared to traditional seedling tray nursing seedlings of early heading; the same quality of seedlings, growth period of artificial transplanting of lightly seedling damage is ahead of 1-2D compare to mechanical planting.2. Different measures to mechanical planting:(1) Between different seedlings matrix, to handle the plant growth period as early as late rice were the shortest, kam card matrix in rice seedlings seedlings, the dry soil and mud seedlings and the three stages of the same times, kam card matrix in rice panel field dry rice-nursery longest, respectively is hand delay 2-4 and 4-6 days.Different matrix, compared with hand planted, early rice growth period delay on transplanting to young ear differentiation stage, late rice growth period delay focused on transplanting to heading stage.(2) Machine transplanting seedling of different water management, as early as late rice were planted(control) to handle the shortest growth period, growth period is the same between different water management, a hand planted delay 2-5 days.Seedling stage between different water management, compared with hand planted, the early rice growth period delay on transplanting to effective tiller critical period, late rice growth period delay focused on transplanting to heading stage.(3) Between different planting models, the growth period of the shortest hand planted, during the period of early rice, the horse high speed and well off plug are of good quality and high speed machine, growth period, the same is hand planted delay 2 days;Small fine walking machine quality is poor, the longest growth period, the hand delay 3 days.During the period of late rice, machine quality quite, between the three kinds of models are within 5%, growth period, are the hand planted delay 4 days.Between different planting models, compared with hand planted, early rice growth period delay on transplanting to effective tiller critical period, late rice growth period delay focused on transplanting to heading stage.(4) Transplanting during this period, the shortest hand planted field growth period, different rate and during the early rice delay 1-3 days, delay of late rice was 2 to 6 days.The same sowing date, between different seeding rate, with the increase of seeding rate, early late rice full panicle stage showed a trend of delay and in optimal seeding rate(90 g/plate), before full panicle stage delayed with the increase of seeding rate;When the rate of more than 90 g/plate, full panicle stage is not with the increase of the rate change.The same rate, different sowing period, with the delay of sowing date, as early as late rice delay trend full panicle stage, before the optimal seeding rate, as the sowing date in advance, full panicle stage, ahead of more than the optimal rate(except on July 5), full panicle stage no longer changes along with the advance of sowing date.Field growth period of the delay is caused by vegetative and reproductive nutrition coexist lengthened, has nothing to do with the reproductive stage.During the early late rice vegetative period with sowing time delay increases gradually, the same sowing date, with the increase of seeding rate and an increasing trend in vegetative period.(5) Not to be inserted on the same depth, hand planted growth period, the shortest growth period are the same, not be inserted on the same depth are extended a hand planted 4 days.Between different ZaiCha depth, compared with hand planted, growth period delay is caused by transplanting to heading stage.(6) Correlation analysis showed that the whole growth period and before transplanting stem and leaf dry weight per plant or 5D after transplanting stem and leaf dry weight per plant were significantly or extremely significantly negative correlation. All kinds of machine transplanting methods effect the growth period of seedling that achieved by seedling quality and transplanting quality. The growth period and seedling quality especially before transplanting stem and leaf dry weight per plant and the quality of machine transplant related: Seedling quality difference is not big, stem and leaf dry weight were similar, the quality of transplanting is similar, so there is no difference between each treatment period; The quality of seedlings is different, the growth period is increasing with per plant stem and leaf dry substances reducing. The quality of seedlings is similar, the growth period of transplanting of poor quality than transplanting of good quality to extend 1 D.3. In the production can reduce the stump leakage rate or take water raised seedling or minimize the sowing and early sowing and use the high performance machine for transplanting and other measures to shorten the growth period of rice delay.