Controlled-release urea (CRU) and urea (U) were used to investigate the effects of five proportions of controlled-release urea blended with urea (100% CRU

25% U+75% CRU

50% U+50% CRU

75% U+25% CRU

100% U) and two controls (no N fertilization

CK1)

conventional fertilization (CK2

60% U as basal and 40% U top-dressed ) on agronomic characters

dry matter accumulation and distribution

and yield in maize. Results were as follows: (1)Nitrogen supply could increase the plant height

ear height

and leaf area

compared to the CK2 treatment

the combination applications of controlled-release urea with urea could increase the plant height

ear height

stalk diameter

and leaf area

improvement effect of the mixing ratio of 75% treatments were the most strong among them. (2)Compared to the CK2 treatment

the combination applications of controlled-release urea with urea could meet demand of life on jointing stage

promote dry matter accumulation on silking stage

and dry matter quantity were improved finally

improvement effect of the mixing ratio of 50%-75% treatments were the most strong among them. (3)Compared to the CK2 treatment

the dry matter of the combination applications of controlled-release urea with urea were lower on distribution proportion of the stalk and leaf

however

the distribution proportion of grain increased

the most in the mixing ratio of 75% treatments. (4)With different ratio of controlled-release urea were always higher

the yield

1 000-kernel weight

the grains per spike

ear length

and ear diameter increased firstly and then gradually decreased. The yield of the mixing ratio of 25%

50%

75%

and 100% increased by 3.70%

8.83%

11.23%

and 5.43% than the CK2. Therefore

applying controlled-release urea with a mixing ratio of 75% of basal dressing was most beneficial to meet the demand of life of maize

promote dry matter accumulation and distribution

and also could increase yield.