[논문]옥수수의 생육 및 수량 증대를 위한 지중점적 관비 시스템의 적용

김종혁; 이연주; 노일래

doi:10.7740/kjcs.2023.68.3.197

옥수수의 생육 및 수량 증대를 위한 지중점적 관비 시스템의 적용
Application of Subsurface Drip Fertigation System to Increase Growth and Yield of Maize 원문보기

Korean journal of crop science = 韓國作物學會誌, v.68 no.3, 2023년, pp.197 - 206

김종혁 (경상국립대학교 응용생명과학부) , 이연주 (경상국립대학교 농학과) , 노일래 (경상국립대학교 농학과)

초록
AI-Helper

본 연구는 지중점적시설을 이용한 옥수수 관수·관비재배시 옥수수의 생육 및 수량 반응을 조사하여 적합한 관수 및 관비기준을 마련하고자 수행되었다. 1) 사양토 조건에서 지중점적시설을 이용한 관비 재배시 옥수수 근권부까지 필요한 수분은 24.3 ton 10a^-1의 물이 소모되었다. 2) 사양토(점토함량 10.2%) 조건에서 한번 관수·관비로 토양수분함량이 25%정도 유지될 수 있는 기간은 25일, 20% 정도까지는 30일간 지속되었다. 3) 지중점적 관수·관비처리에 따른 옥수수 지상부 생육은 N 8 처리구에서 가장 우수하였으며 N 10 처리구에서는 감소하는 경향이 나타났다. 4) 지중점적 관수·관비처리에 따른 옥수수 수량구성요소는 N 8 처리구가 가장 우수하였으며 관수구 대비 약 14%, 무처리 대비 약 30%의 증수 효과를 나타내었다.

Abstract ▼ AI-Helper

This study was conducted to investigate how maize (Zea maize L.) growth and yield were affected by irrigation and fertigation using a subsurface drip system. The system consisted of a buried (40 cm underground) drip pipe that can be used in a semi-permanent manner without affecting agricultural work on the ground. The amount of water required for the fertigation treatment was determined to be 24.3 tons 10a-1 for the sandy loam soil used in this experimental field. Fertigation treatments based on the previously calculated 24.3 tons 10a-1 were carried out as topdressing applications. They were applied through the subsurface drip system with the following fertilizer concentration (nitrogen only, written in kg 10a-1: N 4, N 6, N 8, N 10 ). The other treatments were irrigation only and control (non-treatment). The results indicated that the N 8 treatment was the most effective, increasing yield by 30% and 14% compared with the control and irrigation treatments, respectively. These results highlight the effectiveness of fertigation (N 8 kg 10a-1) at V6 and R1 stage as a form of topdressing fertilization using a subsurface drip system for achieving a high yield and stable maize production.

주제어

표/그림 (11)

그림 Fig. 1. Diagram of the experimental setup using subsurface drip system. The underground drip pipe (30 cm interval of emitter) facilities were buried at 80 cm intervals from each other, 40 cm underground, and placed at 15 × 80 cm intervals. The subsurface drip system consists of a water tank (blue), pump (green), liquid fertilizer mixer tank (yellow), solenoid valve (red circle), and controller (gray).
표 Table 1. Soil chemical properties of the experimental field.
표 Table 2. Soil physical properties of the experimental field.
그림 Fig. 2. Comparison of the average temperature and precipitation during experimental season. The lines represent the normal (red dot line) and average temperature (black line) for 2022. The bars represent the monthly cumulative precipitation.
그림 Fig. 3. Changes in soil moisture content as a result of irrigation treatment using a subsurface drip system as well as changes in soil moisture content by soil depth after irrigation during maize growth using a subsurface drip system.
그림 Fig. 4. Changes in the soil moisture content (A, B) and electrical conductivity (C, D) as a result of fertigation treatment during V6 and flowering stages under a subsurface drip system.
표 Table 3. Changes in growth parameters as a result of fertigation treatment using subsurface drip system during spring.
그림 Fig. 5. Correlation matrix plot for the five major variables. Scatter plots, correlation coefficients (r values), and data distributions are displayed on the bottom left, top right, and center, respectively, *, **, ***denote statistically significant values (P< 0.05, 0.01, and 0.001, respectively). CH: canopy height, LL: leaf length, LW: leaf width, SD: stem diameter, EH: ear height.
그림 Fig. 6. Principal component analysis (PCA) of the effects of different nutrient applications on maize yield components. EL: ear length, EW: ear width, RKSLEL: Ratio of kernel set length to ear length, HKW: hundred kernel weight, NK: number of kernel, and Y: yield.
표 Table 4. The effect of fertigation treatment using subsurface drip system on yield components of spring maize.
그림 Fig. 7. Changes in soil moisture content by soil depth in the first month after fertigation treatment. The red circle indicates that the soil moisture content was maintained at about 25% at a depth of 10 cm underground.

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