聚丙烯酰胺不同施用方式对土壤水分和番茄生长的影响

Effects of PAM with Different Application Methods on Soil Moisture and Tomato Growth

为了促进聚丙烯酰胺(PAM)在番茄生产中的应用,在河套灌区开展了PAM不同施用方式对土壤水分和番茄生长的影响研究。结果表明:不同施用方式提高了土壤水分,特别是在番茄幼果期具有显著作用,其中撒施效果较强,沟施、混施较弱。不同施用方式中,仅撒施提高了番茄的光合速率和蒸腾速率,促进了番茄根、茎、叶生长,极显著提高了番茄产量和土壤水分利用效率,而沟施、混施则极显著降低了番茄产量及水分利用效率;建议PAM在番茄生产中采用撒施。

In order to promote the application of PAM in tomato production, field experiments of PAlM with different application methods on soil moisture and tomato growth were conducted in Hetao irrigation district,Inner Mongolia. The results indicated that PAM enhanced soil moisture, especially in young fruit stage,and the effects of broadcasting was stronger,furrowing and mixing were weaker. Among the different application methods, only broadcasting improved the photosynthetic rate and transpiration rate, boosted the growth of roots, stalks and leaves, and remarkably enhanced the yield and soil water use efficiency, while furrowing and mixing lowering the yield and soil water use efficiency significantly. In the tomato production broadcasting PAM should be the optimum method.