Abstract:
One of the strategies to increase the use of low solar radiation in sweet potato plants (Ipomoea batatas
Lam.) in Papua highlands is to modify the plant environment. The research was done by adapting the
varieties and sticks inclination angles on the abiotic stress condition due to the high level of resistance.
The field experiment used three varieties of sweet potato, combined with four sticks angles using a
randomized group design with three replications. Sweet potato yield consistently correlated strongly with
leaf area index, crop growth rate, net assimilation rate and total dry weight. Results of tuber yields per
hectare were strongly correlated with LAI (r = 0.771**), CGR (r = 0.868**), strongly correlated with NAR
(r = 587*) and were very strongly related with TDW (r = 0.904**). Cangkuang variety combined with 60
0
and 90
0
angles yielded tubers of 28.86 t ha
-1
and 31.53 t ha
-1
.
