ẢNH HƯỞNG CỦA MẬT ĐỘ GIEO TRỒNG VÀ MỨC PHÂN BÓN NPK ĐẾN SINH TRƯỞNG VÀ NĂNG SUẤT CÂY TRỒNG XEN (NGÔ, LẠC) VÀ CÂY TRỒNG CHÍNH (CAO SU) TẠI MAI SƠN, SƠN LA
ẢNH HƯỞNG CỦA MẬT ĐỘ GIEO TRỒNG VÀ MỨC PHÂN BÓN NPK ĐẾN SINH TRƯỞNG VÀ NĂNG SUẤT CÂY TRỒNG XEN (NGÔ, LẠC) VÀ CÂY TRỒNG CHÍNH (CAO SU) TẠI MAI SƠN, SƠN LA
Effects of planting density and NPK fertilizers to the growth and yield of intercopping crops (corn, peanut) and main plant (rubber) in Mai Son, Son La
This study was conducted in Muong Bon, Mai Son district, Son La province to assess the effects of 3-density planting corn and peanuts (70%, 60%, 50% as comparing to pure plant density) and 3 levels of NPK fertilizer for corn and peanuts (according to the process, up to 15%, up 25% from the process) intercropping in rubber cultivation at basic construction phase. Findings after 2 years (2013- 2014) show that net yields of corn, peanut intercropped were the highest at the density of 70% compared to monoculture and increased by 25% of fertilizer compared to the process. Intercropping in the first year was better than in the second year; economic efficiency indicators increased as similar as yield indicators; rubber tree growth in basic construction phase was also better when intercropped with corn and peanuts and reduced the labour work for taking care of them.