Optimizing the Optimal Planting Period for Potato Based on Different Water-Temperature Year Types in the Agro-Pastoral Ecotone of North China

Abstract

Potato is the fourth staple crop in China after wheat, maize and rice. The agro-pastoral ecotone (APE) in North China is a main region for potato production. However, potato yield has been seriously constrained by water shortages because of low precipitation and highly variable precipitation patterns during the growing season in this area. In this study, the Agricultural Production Systems Simulator (APSIM) model was used to simulate potato water-limited yield and historical years were divided into different water-temperature year types to optimize the optimal planting period (OPP) and cultivar of potato. The results showed that the potato yield varied in different water-temperature year types. Fast-developing cultivar Favorita could obtain the highest yield in most places and water-temperature year types due to its relatively short length of tuber formation stage. In this study, we suggest changing the planting date according to the water-temperature year type, which offers a new way to adapt to a highly variable climate. However, our method should be adopted carefully because we only considered climate factors; other agronomic management practices (adjusting planting density, plastic film mulch, conservation tillage etc.) also have a great effect on planting date and cultivar selection, which should be further investigated in the future.

Population growth of Tetranychus truncatus (Acari: Tetranychidae) on different drought-tolerant potato cultivars

“…In 2015, the Chinese Ministry of Agriculture implemented the ‘Potato-as-Staple-Food’ strategy to ensure food security, due to potato’s nutritional value and agronomic advantages (Liu et al 2021, Lu et al 2021). Potato is the fourth most important food crop in China after rice ( Oryza sativa L.), maize ( Zea mays L.), and wheat ( Triticum aestivum L.) (Lu et al 2021, Yang et al 2021). However, its annual production is greatly threatened by sap-sucking pests (Quandahor et al 2021).…”