不同覆盖物保温性及对机插秧苗素质的影响

在大棚育秧的基础上，研究了无纺布覆盖和地膜打孔覆盖育秧方式对水稻秧苗素质及抗逆性的影响。结果表明：无纺布覆盖和打孔覆盖育秧与对照相比秧龄、株高、叶长、根量和百株干重有明显或显著增加，并且秧苗素质好，抗逆性强。无纺布覆盖和打孔覆盖育秧同对照相比明显提高了苗层温度，地膜打孔覆盖育秧偶尔会出现35℃的高温，但通过加大打孔密度、通风可以避免高温和秧苗徒长。因此，在寒地大棚育秧与地膜打孔和无纺布覆盖相结合是一种值得推广的新型育秧方式。

Effects of Different Mulch Materials Heat Preservation on Rice Seedling Quality by Mechanical Transplanting

Depending on raising rice seedlings in the greenhouse, the effects on the seedlings quality and adversity resistance were studied by non-woven fabrics cover nursery seedling （A） , ground-film with hole cover nursery seedling （B） and no cover nursery seedling （C） three seedling-raising methods. The results showed that the quality of A and B was superior to that of C. A and B were significantly higher than C in the seedling age, height, leaf length, root number, dry weight per 100 seedlings. The temperature of A and B were significantly increased compared with C. However, the temperature of B could reach 35℃ occasionally. The high temperature and seedling excessive growth could be restrained by ventilation and increasing the density of drilling. Therefore, greenhouse seedling combined with ground-film with holes and nonwoven coverage was worth promoting.