木素氮肥增效剂研制与增产效应研究

Study on Lignin Synergist for Slowly Release Nitrogen Fertilizer and the Efficiency of Yield Increase.

以造纸黑液中回收的木素为主要原料对尿素改性， 合成的木素长效尿素，具有缓释、长效的作用。脲酶活性降低，肥料水溶性减弱。土壤盆栽实验表明，木素尿素供氮水平较普通尿素高０ ．４ ～１ ．１ 倍。两年冬小麦、夏玉米大田实验分别增产２１ ．４％ 和１２．１ ％ 。

Lignin as a material recovered from pulping black liquor was used to modify general ureas character. The solubility in water and activity of lignin urea are decreased. The fertilizer efficiency is longer than general urea. The results of planting with pots showed that the nitrogen supplying of lignin urea is over 0.4-1.1 times than general urea during the term. Two-year experiment on land showed that the yield of wheat and maize increase by 21.4% and 12.1%.