机插早稻秧苗素质相对较差,秧龄一般只有15~18天,秧苗较小,抗逆性较差,机插后易发生僵苗不发的症状,应根据造成僵苗的原因,采取相应的措施,尽快使僵苗转化。僵苗形成原因。(1)苗质型:育秧时落谷量过高,或严重超秧龄,造成秧苗细长,叶色发黄,风吹易倒,繜苗期显著长于正常秧苗,这种秧苗插后易发生僵苗。(2)虫害型:在秧田期或插入大田后受到稻蓟马、稻象甲等危害,叶片卷缩或破损,秧苗生长滞后而出现僵苗。(3)肥害型:大田有机肥未经充分腐熟或翻 Machine inserted early rice seedling quality is relatively poor, seedling age is generally only 15 to 18 days, smaller seedlings, less resistant to stress, machine inserted prone to the phenomenon of stiff seedlings, should be based on the cause of stiff seedlings, take the appropriate Measures, as soon as possible so that transformation of stiff seedlings. The reason for the formation of stiff seedlings. (1) Seedling quality: When the seedling height is too high at the time of seedling transplanting, or seriously exceed the seedling age, the seedling is slender, the leaf color is yellow, the wind blows easily and the seedling is obviously longer than the normal seedling. Stiff seedlings (2) pest type: In the seedling stage or after being inserted into the field by the rice thrips, rice, such as a harm, leaf curling or damage, seedling growth delay emergence of stiff seedlings. (3) fat type: field organic fertilizer is not fully decomposed or turned over