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Position: Home > Articles > EFFECT OF SLOW-RELEASE UREA ON THE INCREASE OF SOYBEAN YIELD Soybean Science 1991 (4) 335-338

长效尿素对大豆的增产效应

作  者:
莫虹;赵秀春;王凤书
单  位:
黑龙江省农业科学院
关键词:
长效尿素;尿酶抑制剂
摘  要:
尿素施于土壤后,在土壤中尿酶的作用下水解成铵态氮,在土壤水分适宜,土壤温度为10℃以上时,7~10天即达氨化高峰期,使土壤pH值增高,以致氨的挥发强烈.造成氨素损失。为提高尿素的肥效,黑龙江省浩良河化肥厂引进长效尿素生产技术,在生产尿素过程中加入了尿酶抑制剂,制成长效尿素。这种尿素施入土壤后,可抑制土壤尿酶活性,延缓尿素的分解速度,肥效期可达100~120天,其供氮过程与大豆需肥规律基本趋于同步,使大豆在整个生育过程中都能得到氮素营养,生育期间不进行追肥,生育后期也不表现脱肥。 在不同土壤条件下,对大豆进行试验,亩施5~6kg,深施于10~12cm土层中,施长效尿素比普通尿素的增产5.8~25.3%。
译  名:
EFFECT OF SLOW-RELEASE UREA ON THE INCREASE OF SOYBEAN YIELD
作  者:
Mo Hong Zhao Xiu-chun (Heilongjiang Academy of Agricultural Sciences)Wang Feng-shu (General Bureau of Manaagement of Stale Farems)
摘  要:
Slow -release urea was successfully prepared by the Applied Ecology Research Institute of the Chinese Academy of Sciences in 1985. Tech nique of slow - release urea production has been introduced by Haolinghe Factory of Chemical Fertlilizers in 1989, afetr that pilot-production of slow - release urea had been established A definite amoun urea in order times of its effectiveness, decrease the loss of nitrogen. Slow-release urea is granule in light brown or brown color, contains 46% of N, and the retention of its effectiveness reaches 100- 120 days. The comparisons of the effect of slow -release urea with common urea on the increase in yields of soybean were carried out at different soil conditions. Urea and diammonium orthophosphate or triple phosphate were deeply sideressed at the same time. The dose of this two kinds of urea was 5kg per mu. The results of experiments conducted by 12 institutions showed that soybean yield was increased by applying slow -release urea by 8. 3-23. 0kg per mu or 5. 8-25. 3% compared to common ure-a.The content of aminoacids and chlorophyll in plants was analyzedbefore flowering of soybean. By applying slow -release urea the content of aminoacids was increased by 34. 3% , and the content of chlorophyll was increased by 0. 8% compared to the apptication of common urea. The number of grains per plant increased 3. 5-6. 3 grains, and 100 grains' weight increased 0. 1 - 0.7 gram.

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