본 연구에서는 규산질 비료 시용을 통한 질소의 흡수 이용율을 증진하고 이용율 증진에 따른 질소 시비량 저감방안을 모색하였다. 경남 하동 소재의 전형적 논토양(가천통)에서 규산 처리수준에 따른 질소 이용을 증진효과를 평가하기 위해 무처리, 유효규산 $130mg\;kg^{-1}$ 조절 처리, 조절량의 2배 처리와 같은 세 수준의 규산처리를 기본처리구로 설정하였다. 각 규산 처리조건에서 0, 110, $165kg\;ha^{-1}$의 세 수준으로 질소를 처리하여 벼 재배과정 중 수량반응특성 및 양분흡수특성을 조사하였다. 동일수준의 질소 처리조건에서 정조 수량과 질소이용률은 규산질 비료 처리수준이 증가함에 따라 유의적으로 크게 증가되었다. 규산질 비료를 처리하지 않았을 때 질소 $154kg\;ha^{-1}$ 수준에서 최고 정조 수량 획득이 가능하였다. 규산질 비료를 추천량인 $130mg\;kg^{-1}$과 추천량의 배 량 처리시 벼의 생육증가에 따른 질소 흡수 이용율 증가로 약 76과 $52kg\;ha^{-1}$의 질소처리조건에서 규산 무처리 때 얻을 수 있는 최고 정조 수량의 획득이 가능한 것으로 분석되었다. 결과적으로 규산질 비료처리 없이 얻을 수 있는 최고 정조수량을 얻기 위해 필요한 질소 시비량인 $154kg\;ha^{-1}$을 규산질 비료 추천량과 추천량의 배량 처리로 인해 약 76과 $102kg\;ha^{-1}$의 질소 시비량 저감이 각각 가능할 것으로 분석되었다. 그리고 규산질 비료시용으로 토양 pH가 다소 개선되었으며, 토양 내 유효 인산 및 규산 함량이 크게 증가하여 토양의 비옥도 증진에 효과가 있는 것으로 조사되었다.
본 연구에서는 규산질 비료 시용을 통한 질소의 흡수 이용율을 증진하고 이용율 증진에 따른 질소 시비량 저감방안을 모색하였다. 경남 하동 소재의 전형적 논토양(가천통)에서 규산 처리수준에 따른 질소 이용을 증진효과를 평가하기 위해 무처리, 유효규산 $130mg\;kg^{-1}$ 조절 처리, 조절량의 2배 처리와 같은 세 수준의 규산처리를 기본처리구로 설정하였다. 각 규산 처리조건에서 0, 110, $165kg\;ha^{-1}$의 세 수준으로 질소를 처리하여 벼 재배과정 중 수량반응특성 및 양분흡수특성을 조사하였다. 동일수준의 질소 처리조건에서 정조 수량과 질소이용률은 규산질 비료 처리수준이 증가함에 따라 유의적으로 크게 증가되었다. 규산질 비료를 처리하지 않았을 때 질소 $154kg\;ha^{-1}$ 수준에서 최고 정조 수량 획득이 가능하였다. 규산질 비료를 추천량인 $130mg\;kg^{-1}$과 추천량의 배 량 처리시 벼의 생육증가에 따른 질소 흡수 이용율 증가로 약 76과 $52kg\;ha^{-1}$의 질소처리조건에서 규산 무처리 때 얻을 수 있는 최고 정조 수량의 획득이 가능한 것으로 분석되었다. 결과적으로 규산질 비료처리 없이 얻을 수 있는 최고 정조수량을 얻기 위해 필요한 질소 시비량인 $154kg\;ha^{-1}$을 규산질 비료 추천량과 추천량의 배량 처리로 인해 약 76과 $102kg\;ha^{-1}$의 질소 시비량 저감이 각각 가능할 것으로 분석되었다. 그리고 규산질 비료시용으로 토양 pH가 다소 개선되었으며, 토양 내 유효 인산 및 규산 함량이 크게 증가하여 토양의 비옥도 증진에 효과가 있는 것으로 조사되었다.
Silicate (Si) fertilizers are well-known for soil amendment and to improve rice productivity as well as nitrogen efficiency. In this study, we investigated the possible reduction level of nitrogen fertilization for rice cultivation by amending Si fertilizer application. Field experiments were carrie...
Silicate (Si) fertilizers are well-known for soil amendment and to improve rice productivity as well as nitrogen efficiency. In this study, we investigated the possible reduction level of nitrogen fertilization for rice cultivation by amending Si fertilizer application. Field experiments were carried out to evaluate the productivity of rice (Oryza sativa L.) on a silt loam soil, where three levels of nitrogen (0, 110 and $165kg\;ha^{-1}$) were selected and Si fertilizer as a slag type was applied at 0, 1 and 2 times of the recommendation level (available $SiO_2\;130mg\;kg^{-1}$). Application of Si fertilizer increased significantly the rice yield and nitrogen efficiency. With increasing N uptake of rice, 1 and 2 times of recommended levels of Si fertilization could decrease nitrogen application level to about 76 and $102kg\;N\;ha^{-1}$ to produce the target yield, the maximum yield in the non-Si amended treatment. Silicate fertilizer improved soil pH and significantly increased available phosphate and Si contents. Conclusively, the Si fertilizer could be a good alternative source for soil amendment, restoring the soil nutrient balance and to reduce the nitrogen application level in rice cultivation.
Silicate (Si) fertilizers are well-known for soil amendment and to improve rice productivity as well as nitrogen efficiency. In this study, we investigated the possible reduction level of nitrogen fertilization for rice cultivation by amending Si fertilizer application. Field experiments were carried out to evaluate the productivity of rice (Oryza sativa L.) on a silt loam soil, where three levels of nitrogen (0, 110 and $165kg\;ha^{-1}$) were selected and Si fertilizer as a slag type was applied at 0, 1 and 2 times of the recommendation level (available $SiO_2\;130mg\;kg^{-1}$). Application of Si fertilizer increased significantly the rice yield and nitrogen efficiency. With increasing N uptake of rice, 1 and 2 times of recommended levels of Si fertilization could decrease nitrogen application level to about 76 and $102kg\;N\;ha^{-1}$ to produce the target yield, the maximum yield in the non-Si amended treatment. Silicate fertilizer improved soil pH and significantly increased available phosphate and Si contents. Conclusively, the Si fertilizer could be a good alternative source for soil amendment, restoring the soil nutrient balance and to reduce the nitrogen application level in rice cultivation.
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가설 설정
Therefore, Si fertilizer would be a good alternative source to decrease nitrogen fertilizer application rate through increasing nitrogen efficiency. In this study we determined the possible reducing the of nitrogen fertilization th'ough Si application in rice paddy field.
제안 방법
Rice seedlings of Juam cultivar were transplanted at a spacing of 30 x 15 cm by hand in the experimental field in early June and harvested in the mid October. As basal fertilizers 50, 100 and 70% of allotted N,P2O5 and K2O were applied 2 days before transplanting, respectively. Tillering fertilizer (20% of assigned N) was applied 15 days after transplanting and panicle fertilizer (30% of N and K2O allotted) 50 days after transplanting.
The plots were arranged in a completely randomized design in the experimental field and each treatment was carried out in triplicate. Rice seedlings of Juam cultivar were transplanted at a spacing of 30 x 15 cm by hand in the experimental field in early June and harvested in the mid October.
대상 데이터
Experimental site and treatment The experimental field was prepared in Hadong (35°6'27"N 127°49'28"E), in southern Korea in May 2002. The soil type is Jisan series (a somewhat poorly drained silt loam of Endoaquepts) and the chemical properties of paddy soil are shown in Table 1.
The soil type is Jisan series (a somewhat poorly drained silt loam of Endoaquepts) and the chemical properties of paddy soil are shown in Table 1. Experimental plots, 80 m2 (10 m x 8 m), in size were designed. Two experiments were conducted: first in 2002 and second in 2004.
데이터처리
Statistical analysis A SAS statistical package wasused to analyze the rice yield (Little and Hills, 1978). One-way ANOVA was carried out to compare the means of the different treatments; where significant F values were detected, the differences between individual means were tested using the Least Significant Difference (LSD) test.
이론/모형
0, UV spectrometer). The available P content was determined using the Lancaster method (RDA, 1988): 5 g of soil were extracted with 20 mL of 0.33 M CH3COOH, 0.15 M lactic acid, 0.03 M NH4F, 0.05 M (NH/SCh and 0.2 M NaOHatpH4.25.
성능/효과
Finally, it may be concluded that the present study revealed Si fertilizer as an alternative source of soil amendment to enhance rice productivity and nitrogen efficiency in paddy soils. The Si fertilizer increased soil pH, available Si and phosphate, and exchangeable calcium in the amended soil.
참고문헌 (28)
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