| This article has been：Browse 1195Times Download 1972Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2021047 |
|
| Irrigation and Nitrogen Application Affect Early-stage Growth and Development of Fruit Corn |
|
ZHANG Xu, XIONG Yousheng, XIE Yuanyuan, et al.
|
| Abstract: |
| 【Objective】Autumn droughts have become increasingly frequent in Hubei province in recent years resulting in water stress for fruit corn growth. The purpose of this paper is to investigate how irrigation and nitrogen (N) fertilization combine to affect early-stage growth and development of the corn. 【Method】The field experiment was conducted in 2020; it consisted of three irrigation treatments: conventional irrigation (W1), drip irrigation (W2) and sprinkler irrigation (W3); and three nitrogen fertilizations: no nitrogen application (N0), low nitrogen application of 90 kg/hm2 (N90), and high nitrogen application 180 kg/hm2 (N180). In each treatment, we measured the change in root and shoot traits, as well as acquisition of phosphorus (P), potassium (K) and N by the plant. 【Result】Irrigation and nitrogen application both showed significant impact on plant growth, root development, absorption and utilization of P and K. When nitrogen fertilization was the same, sprinkler irrigation significantly promoted shoot and root growth, dry matter accumulation, nutrient absorption and growth traits. Compared with conventional and drip irrigation, it also increased the above-ground dry weight by 38.64% and 40.84%, root dry weight by 37.50% and 45.68%, N absorption by 36.61% and 28.83%, P absorption by 45.12% and 40.28%, and P absorption by 45.34% and 30.47%, respectively. When the irrigation method was the same, N application promoted growth of both shoots and roots, in addition to the increased dry matter accumulation and nutrient absorption. Among all fertilizations, N180 fertilization gave the highest growth indices, followed by N90. 【Conclusion】Irrigation and nitrogen application had a significant coupling-effect on growth of the shoots and roots of the fruit corn during its early growth stage. Our results revealed that sprinkler irrigation combined with 180 kg/hm2 of N fertilization can increase plant dry weight and is hence suggested as an improved agronomic management for fruit corn production in Hubei province. |
| Key words: fruit corn; plant growth; nutrient absorption; root morphology |
|
|
