The test took Jiande City,Zhejiang Province as the test site.The locally promoted hybrid medium indica rice variety Jiafengyou 2 was selected and Hangzhou Fengzhu XL-21 intelligent temperature control equipment was used to compare the seedling characteristics and machine transplanted rice yield differences between stacked and conventional seedlings under different temperature and humidity combinations.The results showed that,The comprehensive characteristics of seedlings cultivated by stacking 35℃/90%treatment performed best.The seedling rate reached 96.1%,which was 12.8 percentage points higher than that of conventional seedling raising control.Indicators such as seedling height,leaf age,and root vitality were also significantly improved.The seedling lack rate,missed transplanting rate and floating seedling rate dropped to 3.6%,1.1%and 1.6%,respectively,which was significantly lower than that of conventional seedling raising.The highest yield was 9 412.5 kg·hm-2,which increased by 15.1%compared with conventional seedling raising.Comprehensive analysis shows that the temperature of 35℃and relative humidity of 90%are the best temperature and humidity conditions for stacked rice seedlings of Jiafengyou 2 in Jiande City.The yield increase advantage of stacked rice seedlings basically increases with the improvement of temperature and humidity conditions.
stacked tray seedling raisingtemperature and humidityseedling qualitymachine-transplanted riceyield research
万方数据
维普
