Effects of Different Seedling Raising Matrixes on Seedling Quality and Yield of Mechanical Transplanted Double Cropping Rice

The effects of different seedling raising matrixes on seedling quality and yield of mechanical transplanting double cropping rice were studied by taking double cropping early rice varieties of Chuanguang No.1 and Zhongjiazao17 and double cropping late rice varieties Rongyou225 and Hemeizhan as materials.The results showed that among early rice,of M3(seedling raising fertilizer) leaf age was relatively elder and stem width was larger and of M1(special rice seedling raising matrix) the 100-seedling dry weight was the lightest.Among late rice,of M3 the leaf age was relatively young and stem width was minor and of M1 the 100-seedling dry weigh was the heaviest.Among early and late rice,M3 was the shortest in seedling height and higher in the panicle rate,while M1 was more dominant in terms of seedling emergence rate,weak seedling rate,biological yield and grain number per panicle.The yield of early rice with M1 and late rice with M3 was higher than that of other matrixes.In 13.33 cm of mechanical transplanting distance between hill,the yield of early rice Chuanguang No.1 and late rice Rongyou225 were separately higher than that of Zhongjiazao17 and Hemeizhan.Moreover,that the yield of rice with 23.33 cm of mechanical transplanting distance between hill was higher than that with 30.00 cm.