多效唑在棉花滴灌上的应用效果研究

A Study on Effects of PP333 in Trickle irrigation Cotton Field

在膜下滴灌棉田，通过滴灌系统将多效唑ＰＰ３３３ 随水土施对棉花进行化学调控。研究表明，多效唑随水土施可有效地控制植株生长，矮化节间长度，增加单铃重，提高衣分率。施用多效唑可显著增加棉花产量，提高经济效益，与叶面喷施缩节胺相比，每公顷增产籽棉４４７ ．６ ｋｇ，增产率１０ ．３８ ％ ，每公顷净增收４６３ ．４ ～１ ６７０ ．９

The effect of PP333 on cotton grown in the trickle irrigation field was investigated.It showed:cotton growth was regulated validly by using PP333 through trickle irrigation system.The joint length was shortened.Single boll weight and lint percent in PP333 treated plants were higher than in DPC treated.By applying PP333,unginned cotton produce was increased and economic benefits were improved.Compared with DPC treatments,PP333 treatment unginned cotton produce was increased 447.6 kg/km\+2 and value was raised 463.4～1670.9 yuan/hm\+2.\;