Abstract: The maize variety Nonghua 101 was used as test material,to study the response of dry matter accumulation and translocation to planting patterns and planting densities of spring maize, including 2 planting patterns:wide-narrow row (80 cm+40 cm,KZ) and equal row spacing (60 cm, CK), and 3 planting densities. The dry matter accumulation amount at different stages of growth was measured, and the dry matter transfer amount and contribution rate to seeds were calculated. The results showed that the grain yields of maize in 3 densities of two experimental areas all showed KZ>CK, reaching to a significant level, and the increase rate ranging from 2.5% to 15.1%. The leaf area index was also KZ>CK. At the later growth stage, the decrease rate of leaf area index was CK>KZ, and the greater the density, the greater the decline. The SPAD value of leaves was KZ>CK at all stages, except for the leaves above ear in D1 and D2 densities at silking stage. The canopy transmittance was KZ>CK for all levels and in all densities, reaching to a significant level. The total dry matter accumulation and translocation amounts of stems and leaves showed KZ>CK in all three planting densities, reaching to a significant level. The contribution rate of stem-sheath and leaf to seeds was also KZ>CK at all densities, of which the highest came from the Daxingtun treatment with wide-narrow row planting pattern and D3 density. In Xiliaohe River Plain and similar areas, the planting pattern of wide-narrow row was beneficial to delaying the leaf senescence and increasing the dry matter accumulation and translocation under higher density during the late growth period, and might be an effective way to increase the density and the yield.

Key words: Spring maize, Dry matter accumulation, Planting pattern, Planting density, Transport

CLC Number: 

• S513.01