Influence of planting distance and density on the yield and photosynthetic traits of sweet potato (Ipomoea balatas L.) under an intercropping system with walnut (Juglans regia) saplings

被引：19

作者：

Song, Dagang ^{[1
,2
,3
]}

Tariq, Akash ^{[2
,4
,5
,6
]}

Pan, Kaiwen ^{[1
]}

Khan, Shahid Ullah ^{[7
]}

Saleh, Tawfik A. ^{[8
]}

Gong, Shanxing ^{[1
]}

Zhang, Aiping ^{[1
,2
]}

Wu, Xiaogang ^{[1
]}

机构：

[1] Chinese Acad Sci, Chengdu Inst Biol, Key Lab Mt Ecol Restorat & Bioresource Utilizat &, Key Lab Sichuan Prov, Chengdu 610041, Sichuan, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 10049, Peoples R China

[3] Minist Agr & Rural Affairs, Biogas Inst, Chengdu 610041, Sichuan, Peoples R China

[4] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China

[5] Cele Natl Stn Observ & Res Desert Grassland Ecosy, Cele 848300, Peoples R China

[6] Chinese Acad Sci, Key Lab Biogeog & Bioresource Arid Zone, Urumqi 848300, Peoples R China

[7] Huazhong Agr Univ, Coll Plant Sci & Technol, Natl Key Lab Crop Genet Improvement, Wuhan 430070, Hubei, Peoples R China

[8] King Fahd Univ Petr & Minerals, Dept Chem, Dhahran 31261, Saudi Arabia

来源：

SOIL & TILLAGE RESEARCH | 2020年 / 196卷

关键词：

Sweet potato fresh root tuber yield; Photosynthesis; Intercropping; Planting distance; Plant densities; DIFFERENT SHADE LEVELS; TUBER YIELD; MAIZE; GROWTH; ROW; COMPLEMENTARY; COMPETITION; MANAGEMENT; EFFICIENCY; RESPONSES;

D O I：

10.1016/j.still.2019.104484

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Sweet potato is a high-yield food crop with strong adaptation and is widely cultivated in southwestern China. Adjusting crop planting distance and planting density to improve the yield and productivity of intercropping systems has become an important management practice around the globe. However, little is known about the response of the sweet potato yield and photosynthetic characteristics to intercropping with walnut saplings. Field experiments were conducted in a split-plot arrangement, e.g., three plant densities (D1, low, 4 plants/m(2); Dm, moderate, 8 plants/m(2); and Dh, high, 12 plants/m(2)) were randomly assigned (subplot) to three planting distances (P1, 0.25 n; P2, 0.5 n; and P3, n) (main plot). The results showed that with increasing plant distance, the yield of high-density sweet potatoes decreased significantly (P < 0.05). However, the highest sweet potato fresh root tuber yield (FRTY) appeared in the combination of P1Dh (plant distance: 0.25 n; plant density: 12 plants m(2)). Our data further suggested that under the planting distance of P1 (0.25 n) or P2 (0.5 n), soil moisture content increased significantly (approximately 3%) with planting density (P < 0.05). The net photosynthetic rate (P-n) of sweet potatoes was significantly improved in cases of high sweet potato density and a short distance between sweet potatoes and walnut saplings, which ultimately increased yield. For the walnut saplings and sweet potatoes, a more compact planting distance was associated with higher values of P-n, T-r and G(s). Based on yield performance, photosynthetic traits and walnut sapling growth, the combination of 12 plants/m(2) and P1 is the optimal scheme for walnut/sweet potato intercropping systems.

引用

页数：8