文献类型： 外文期刊

作者： Shah, T. ¹ ; Khan, H. ¹ ; Noor, M. A. ³ ; Ghoneim, A. ⁴ ; Wang, X. ⁵ ; Sher, A. ⁶ ; Nasir, M. ⁷ ; Basahi, M. A. ⁸ ;

作者机构： 1.Univ Agr, Dept Agron, Peshawar, Pakistan

2.Chinese Acad Agr Sci, Key Lab Oil Crop Biol & Genet Improvement, Oil Crops Res Inst, Wuhan, Hubei, Peoples R China

3.Chinese Acad Agr Sci, Key Lab Crop Physiol & Ecol, Minist Agr, Inst Crop Sci, Beijing 100081, Peoples R China

4.King Saud Univ, Coll Food & Agr Sci, Dept Soil Sci, POB 2460, Riyadh 11451, Saudi Arabia

5.Yanan Univ, Coll Life Sci, Yanan 716000, Shaanxi, Peoples R China

6.Anhui Agr Univ, Sch Agron, Hefei 230036, Anhui, Peoples R China

7.Northwest Agr & Forestry Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China

8.Shaqra Univ, Coll Sci & Arts, Dept Biol, POB 33, Shaqra 11961, Saudi Arabia

关键词： fertilizer rate; maize; deficit irrigation; ear characteristics; grain yield

期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.711； 五年影响因子：0.796 ）

ISSN： 1589-1623

年卷期： 2018 年 16 卷 5 期

页码：

收录情况： SCI

摘要： Potassium (K) as a macro nutrient governs important physiological mechanisms ensuring optimum plant growth and produce quality. An experiment was conducted during the summer of 2017 to study the effects of potassium application on maize under high nitrogen (N) nutrition with optimum and reduced irrigations. The experiment was comprised of three factors, viz. two irrigation levels (optimum, reduced), three potassium levels (80, 120 and 160 kg ha(-1)) and four nitrogen levels (100, 150, 200 and 250 kg ha(-1)). Two separate trials were carried out in randomized complete block design (RCBD), one under optimum (five irrigations) and another under reduced irrigation (three irrigations). One control plot (OK, ON) was used under each replication for both trials. Optimum irrigation had resulted in maximum days of tasseling, silking, physiological maturity, crop growth rate (CGR), net assimilation rate (NAR), absolute growth rate (AGR), plant height, grains ear', thousand grains weight, biological yield, grain yield, chlorophyll contents and shelling percentage. High N (250 kg ha(-1)) delayed tasseling, silking and physiological maturity and resulted in maximum growth, physiological traits and biological yields. However, 150 kg N ha(-1) had resulted in maximum number of ears ill 2 , number of grains ear(-1) , thousand grains weight and grain yield. While 100 kg N ha(-1) had resulted in early tasseling, silking and physiological maturity. Potassium fertilization at the rate of 160 kg ha(-1) delayed phenology and recorded with maximum growth rates, improved physiology and maximum yield traits and grain yield. However, the treatment 120 kg K ha(-1) remained almost statistically similar to the 160 kg K ha(-1) for most of the parameters. In the case of control vs rest, generally the performance of the control plot was poor. Hence, 150 kg N ha(-1) with 120 kg K ha(-1) under optimum irrigation is recommended for optimum productivity of maize crop.