| Coupling effects of irrigation and potassium fertilization on root morphological characters and yield of peanut |
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| DOI：10.7606/j.issn.1000-7601.2016.04.26 |
| Key Words: peanut coupling effects of irrigation and potassium root yield |
| Author Name | Affiliation | | ZHANG Peng | College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer in The Development and Reform Commission, Shenyang, Liaoning 110866
China
Key Laboratory of Ministry of Agriculture of Northeast Farmland Conservation, Shenyang, Liaoning 110866, China | | ZHANG Yu-long | College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer in The Development and Reform Commission, Shenyang, Liaoning 110866
China
Key Laboratory of Ministry of Agriculture of Northeast Farmland Conservation, Shenyang, Liaoning 110866, China | | ZOU Hong-tao | College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer in The Development and Reform Commission, Shenyang, Liaoning 110866
China
Key Laboratory of Ministry of Agriculture of Northeast Farmland Conservation, Shenyang, Liaoning 110866, China | | ZHANG Yu-ling | College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer in The Development and Reform Commission, Shenyang, Liaoning 110866
China
Key Laboratory of Ministry of Agriculture of Northeast Farmland Conservation, Shenyang, Liaoning 110866, China | | LIAO Chang-jian | College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer in The Development and Reform Commission, Shenyang, Liaoning 110866
China
Key Laboratory of Ministry of Agriculture of Northeast Farmland Conservation, Shenyang, Liaoning 110866, China | | YU Na | College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China
National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer in The Development and Reform Commission, Shenyang, Liaoning 110866
China
Key Laboratory of Ministry of Agriculture of Northeast Farmland Conservation, Shenyang, Liaoning 110866, China |
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| Abstract: |
| In order to optimize the coupling model of water and potassium, a pot experiment was conducted to analyze the association of root morphological characters and yield of peanut to the coupling effects of water-potassium. Huayu 25 (peanut species) had been treated as the test seed. The results showed that the irrigation was the key factor that had a significant (P<0.05) effect on peanut root length, and had an extremely significant (P<0.01) effect on all other indicators. Mild water stress W2 (50%FC) was promotive to the elongation of roots, while the moist soil environment was advantageous to the thickening of the root system. Root indexes average value of moisture effect indicated that the total root length under the mild water stress (W2) reached the maximum, increased by 9.22% from that by the moderate water W3 (65%FC). Effects on root diameter followed the order of W4(80%FC)>W3(65%FC)>W2(50%FC)>W1(35%FC). Total surface area and total volume were increased first and then became decreased with the increase of moisture content. The maximum values of two indexes were obtained by W3. Adding potassium fertilizer was beneficial to root growth and development. Effects on root indexes average value including total root volume, total surface area and total length by potassium followed the order of K3 (405 kg·hm-2)>K2 (270 kg·hm-2) >K1 (135 kg·hm-2)>K0 (0 kg·hm-2). The root biomass by K3 and K4 was 23.18% and 9.27% higher than that by K0. Only the coupling effect of water and potassium on the number of nodules reached a very significant level (P<0.01). Potassium fertilizer could promote the formation of nodules in drought conditions. Under the condition of water stress (W1) and mild water stress (W2), the number of root nodules was increased with the dosage increment of potassium. The treatment W3K2 could promote the root average diameter, total length, total surface area and total volume, and caused the highest pod yield. Compared to treatment W3K0 with no potassium, the pod yield was increased by 12.7%. In conclusion, the study suggested that it is beneficial to the growth of roots and the formation of nodules when the moisture retains a level of 65% FC and the potassium fertilizer was increased to 270 kg·hm-2, not only to get high yield, but also to achieve the purpose of saving water and fertilizer. |
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