Effects of distance from a tree line on photosynthetic characteristics and yield of wheat in a jujube tree/wheat agroforestry system

2018 ◽  
Vol 93 (4) ◽  
pp. 1545-1555 ◽  
Author(s):  
T. Yang ◽  
Z. P. Duan ◽  
Y. Zhu ◽  
Y. W. Gan ◽  
B. J. Wang ◽  
...  
Keyword(s):  
Agroforestry System ◽  
Photosynthetic Characteristics ◽  
Tree Line ◽  
Jujube Tree

Impact of Rhizosphere on Competitive Effects of Neem (Azadirachta indica A. Juss.) on Associated Pigeonpea [Cajanus cajana (L.) Millsp.] in a Agroforestry System

2021 ◽  
Author(s):  
Honnayya . ◽  
B.M. Chittapur ◽  
Doddabasawa .
Keyword(s):  
Management Practices ◽  
Light Availability ◽  
Soil Health ◽  
Ecological Factors ◽  
Agroforestry System ◽  
Tree Line ◽  
Conventional Agriculture ◽  
Competitive Effects ◽  
Traditional Agroforestry ◽  
Economic Considerations

Background: Sustained agriculture has close intimacy with trees. However, the conventional agriculture had broken this intimacy especially by keeping trees away from the farm land for short term economic considerations. Tree may influence the associated crop either positively or negatively depending on its age, species, density, environment and management practices. Hence, understanding nature and extent of competitive effect is utmost important in adopting management practices to improve overall productivity. Methods: An investigation was carried out to assess yield variation if any in pigeonpea and the primary ecological factors responsible for the same when it was grown in association with neem (25 years old) on field bunds in a traditional agroforestry system during 2018-19 in semi-arid tropics of Karnataka, India at three distances mainly 2-7.4, 7.4-12.8 and 12.8-18.2 m on E and W of N-S and N and S of E-W tree lines.Result: Averaged over directions significantly lower pigeonpea yield (3.76 q ha-1) was recorded near the tree line at 2-7.4m distance, while it increased with increase in the distance from tree line and was the highest (7.61q ha-1) at far away distance (12.8-18.2 m) at which yield was on par with control (without any trees), though soil near the tree line (2-7.4m) recorded significantly higher soil organic carbon and microbial population (fungi, bacteria and actinomycetes) indicating better soil health and moisture.This leads to the conclusion that it is not merely the rhizosphere characteristics or neem root interference but the above ground factors particularly light availability to pigeonpea as influenced by neem canopy is important in the agroforesty system.

On-farm evaluation of pigeonpea (Cajanus cajana L. Millsp.) - neem (Azadirachta indica A. Juss.) agroforestry systems in the Deccan Plateau

2018 ◽  
Author(s):  
Doddabasawa . ◽  
B. M. Chittapur ◽  
M. Mahadeva Murthy
Keyword(s):  
Tree Height ◽  
Agroforestry System ◽  
Agroforestry Systems ◽  
Tree Line ◽  
The North ◽  
Significant Difference ◽  
North Eastern ◽  
Dry Zone ◽  
Biomass Yields ◽  
Deccan Plateau

The performance of neem based agroforestry system was studied during 2016-17 under rainfed ecosystem on farmers’ fields on participatory mode in Yadagir district in the North-eastern dry zone (Zone II) of Karnataka. Grain and biomass yields and harvest index of pigeonpea did not vary significantly among the agroforestry systems. However, significantly lower grain (1192 kg ha-1) and biomass (5563 kg ha-1) yields of pigeonpea were recorded at 5 m distance away from the neem tree line (P=0.05) compared to the distances of 10 m ( 1450 and 6942 kg ha-1, respectively) and 15 m (1449 and 6720 kg ha-1, respectively) away from the tree line. Significantly higher grain yield (1520 kg ha-1) was observed in control without any proximity of trees compared to the agroforestry systems which accounted for a mean reduction of 11 per cent in yield. Among different agroforestry systems, significantly higher tree height was recorded in bund planting (7.61m) followed by boundary planting (7.38 m) and scattered planting (6.46 m) whereas the crown spread recorded was significantly lower in bund planting (6.27 m) followed by scattered planting (6.38 m) and boundary planting (6.68 m). There also existed non-significant difference in girth, volume and biomass of neem trees grown in different agroforestry systems. Further, the physicochemical properties of soil were found improved in agroforestry systems compared to control and the trend varied among the different agroforestry systems

Competitive interaction in jujube tree/cotton agroforestry system in Xinjiang province, northwestern China

2017 ◽  
Vol 93 (2) ◽  
pp. 591-605 ◽  
Author(s):  
W. Zhang ◽  
B. J. Wang ◽  
Y. W. Gan ◽  
Z. P. Duan ◽  
X. D. Hao ◽  
...  
Keyword(s):  
Agroforestry System ◽  
Competitive Interaction ◽  
Northwestern China ◽  
Jujube Tree

Root distribution and interactions in jujube tree/wheat agroforestry system

2013 ◽  
Vol 87 (4) ◽  
pp. 929-939 ◽  
Author(s):  
W. Zhang ◽  
P. Ahanbieke ◽  
B. J. Wang ◽  
W. L. Xu ◽  
L. H. Li ◽  
...  
Keyword(s):  
Root Distribution ◽  
Agroforestry System ◽  
Jujube Tree

Competitive interaction in a jujube tree/wheat agroforestry system in northwest China’s Xinjiang Province

2016 ◽  
Vol 91 (5) ◽  
pp. 881-893 ◽  
Author(s):  
W. Zhang ◽  
B. J. Wang ◽  
Y. W. Gan ◽  
Z. P. Duan ◽  
X. D. Hao ◽  
...  
Keyword(s):  
Agroforestry System ◽  
Competitive Interaction ◽  
Jujube Tree

Productivity of Pigeonpea [Cajanus cajana (L.) Millsp] under Teak (Tectona grandis) Based Agroforestry Systems in Semiarid Tropics

2020 ◽  
Author(s):  
Doddabasawa . ◽  
B.M. Chittapur ◽  
M. Mahadeva Murthy
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Biomass Yield ◽  
Tectona Grandis ◽  
Agroforestry System ◽  
Agroforestry Systems ◽  
Tree Line ◽  
North Eastern ◽  
Dry Zone ◽  
Semiarid Tropics

The productivity of teak based agroforestry system was studied during 2016-17 under irrigated ecosystem in Yadagir district of North-eastern dry zone (None II) of Karnataka. Significantly lower pigeonpea grain yield (1766 kg ha-1) and biomass yield (8207 kg ha-1) in association with teak were recorded at 5 m away from the tree line compared to the crop at a distance 10 m (2345 and 10089 kg ha-1, respectively) and 15 m (8207, 10526 kg ha-1, respectively) away from the tree line whereas harvest index remained unaffected. Non-significant differences were observed in grain yield and harvest index, albeit numerically higher grain yield were recorded in the control (2316 kg ha-1) without teak nearby compared to the agroforestry systems and within agroforestry systems boundary planting recorded numerically higher grain yield (2228 kg ha-1) than with bund planting (2081 kg ha-1). Significantly higher girth, volume and biomass of teak were recorded in bund planting (76.37 cm, 0.390 m3 and 215 kg, respectively) followed by silvi-horti system (72.65 cm, 0.381m3 and 209 kg, respectively) and boundary planting (69.10 cm, 0.342 m3 and 215 kg, respectively), whereas significantly lower girth, volume and biomass were recorded in block plantation (51.45 cm, 0.182 m3 and 100 kg, respectively). The study also revealed significantly lower crown spread in block plantation (2.85 m) followed by boundary planting (4.63 m).

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